1 /* 2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include <assert.h> 12 #include <stdlib.h> // qsort() 13 14 #include "./vp9_rtcd.h" 15 #include "./vpx_dsp_rtcd.h" 16 #include "./vpx_scale_rtcd.h" 17 18 #include "vpx_dsp/bitreader_buffer.h" 19 #include "vpx_dsp/bitreader.h" 20 #include "vpx_dsp/vpx_dsp_common.h" 21 #include "vpx_mem/vpx_mem.h" 22 #include "vpx_ports/mem.h" 23 #include "vpx_ports/mem_ops.h" 24 #include "vpx_scale/vpx_scale.h" 25 #include "vpx_util/vpx_thread.h" 26 27 #include "vp9/common/vp9_alloccommon.h" 28 #include "vp9/common/vp9_common.h" 29 #include "vp9/common/vp9_entropy.h" 30 #include "vp9/common/vp9_entropymode.h" 31 #include "vp9/common/vp9_idct.h" 32 #include "vp9/common/vp9_thread_common.h" 33 #include "vp9/common/vp9_pred_common.h" 34 #include "vp9/common/vp9_quant_common.h" 35 #include "vp9/common/vp9_reconintra.h" 36 #include "vp9/common/vp9_reconinter.h" 37 #include "vp9/common/vp9_seg_common.h" 38 #include "vp9/common/vp9_tile_common.h" 39 40 #include "vp9/decoder/vp9_decodeframe.h" 41 #include "vp9/decoder/vp9_detokenize.h" 42 #include "vp9/decoder/vp9_decodemv.h" 43 #include "vp9/decoder/vp9_decoder.h" 44 #include "vp9/decoder/vp9_dsubexp.h" 45 46 #define MAX_VP9_HEADER_SIZE 80 47 48 static int is_compound_reference_allowed(const VP9_COMMON *cm) { 49 int i; 50 for (i = 1; i < REFS_PER_FRAME; ++i) 51 if (cm->ref_frame_sign_bias[i + 1] != cm->ref_frame_sign_bias[1]) return 1; 52 53 return 0; 54 } 55 56 static void setup_compound_reference_mode(VP9_COMMON *cm) { 57 if (cm->ref_frame_sign_bias[LAST_FRAME] == 58 cm->ref_frame_sign_bias[GOLDEN_FRAME]) { 59 cm->comp_fixed_ref = ALTREF_FRAME; 60 cm->comp_var_ref[0] = LAST_FRAME; 61 cm->comp_var_ref[1] = GOLDEN_FRAME; 62 } else if (cm->ref_frame_sign_bias[LAST_FRAME] == 63 cm->ref_frame_sign_bias[ALTREF_FRAME]) { 64 cm->comp_fixed_ref = GOLDEN_FRAME; 65 cm->comp_var_ref[0] = LAST_FRAME; 66 cm->comp_var_ref[1] = ALTREF_FRAME; 67 } else { 68 cm->comp_fixed_ref = LAST_FRAME; 69 cm->comp_var_ref[0] = GOLDEN_FRAME; 70 cm->comp_var_ref[1] = ALTREF_FRAME; 71 } 72 } 73 74 static int read_is_valid(const uint8_t *start, size_t len, const uint8_t *end) { 75 return len != 0 && len <= (size_t)(end - start); 76 } 77 78 static int decode_unsigned_max(struct vpx_read_bit_buffer *rb, int max) { 79 const int data = vpx_rb_read_literal(rb, get_unsigned_bits(max)); 80 return data > max ? max : data; 81 } 82 83 static TX_MODE read_tx_mode(vpx_reader *r) { 84 TX_MODE tx_mode = vpx_read_literal(r, 2); 85 if (tx_mode == ALLOW_32X32) tx_mode += vpx_read_bit(r); 86 return tx_mode; 87 } 88 89 static void read_tx_mode_probs(struct tx_probs *tx_probs, vpx_reader *r) { 90 int i, j; 91 92 for (i = 0; i < TX_SIZE_CONTEXTS; ++i) 93 for (j = 0; j < TX_SIZES - 3; ++j) 94 vp9_diff_update_prob(r, &tx_probs->p8x8[i][j]); 95 96 for (i = 0; i < TX_SIZE_CONTEXTS; ++i) 97 for (j = 0; j < TX_SIZES - 2; ++j) 98 vp9_diff_update_prob(r, &tx_probs->p16x16[i][j]); 99 100 for (i = 0; i < TX_SIZE_CONTEXTS; ++i) 101 for (j = 0; j < TX_SIZES - 1; ++j) 102 vp9_diff_update_prob(r, &tx_probs->p32x32[i][j]); 103 } 104 105 static void read_switchable_interp_probs(FRAME_CONTEXT *fc, vpx_reader *r) { 106 int i, j; 107 for (j = 0; j < SWITCHABLE_FILTER_CONTEXTS; ++j) 108 for (i = 0; i < SWITCHABLE_FILTERS - 1; ++i) 109 vp9_diff_update_prob(r, &fc->switchable_interp_prob[j][i]); 110 } 111 112 static void read_inter_mode_probs(FRAME_CONTEXT *fc, vpx_reader *r) { 113 int i, j; 114 for (i = 0; i < INTER_MODE_CONTEXTS; ++i) 115 for (j = 0; j < INTER_MODES - 1; ++j) 116 vp9_diff_update_prob(r, &fc->inter_mode_probs[i][j]); 117 } 118 119 static REFERENCE_MODE read_frame_reference_mode(const VP9_COMMON *cm, 120 vpx_reader *r) { 121 if (is_compound_reference_allowed(cm)) { 122 return vpx_read_bit(r) 123 ? (vpx_read_bit(r) ? REFERENCE_MODE_SELECT : COMPOUND_REFERENCE) 124 : SINGLE_REFERENCE; 125 } else { 126 return SINGLE_REFERENCE; 127 } 128 } 129 130 static void read_frame_reference_mode_probs(VP9_COMMON *cm, vpx_reader *r) { 131 FRAME_CONTEXT *const fc = cm->fc; 132 int i; 133 134 if (cm->reference_mode == REFERENCE_MODE_SELECT) 135 for (i = 0; i < COMP_INTER_CONTEXTS; ++i) 136 vp9_diff_update_prob(r, &fc->comp_inter_prob[i]); 137 138 if (cm->reference_mode != COMPOUND_REFERENCE) 139 for (i = 0; i < REF_CONTEXTS; ++i) { 140 vp9_diff_update_prob(r, &fc->single_ref_prob[i][0]); 141 vp9_diff_update_prob(r, &fc->single_ref_prob[i][1]); 142 } 143 144 if (cm->reference_mode != SINGLE_REFERENCE) 145 for (i = 0; i < REF_CONTEXTS; ++i) 146 vp9_diff_update_prob(r, &fc->comp_ref_prob[i]); 147 } 148 149 static void update_mv_probs(vpx_prob *p, int n, vpx_reader *r) { 150 int i; 151 for (i = 0; i < n; ++i) 152 if (vpx_read(r, MV_UPDATE_PROB)) p[i] = (vpx_read_literal(r, 7) << 1) | 1; 153 } 154 155 static void read_mv_probs(nmv_context *ctx, int allow_hp, vpx_reader *r) { 156 int i, j; 157 158 update_mv_probs(ctx->joints, MV_JOINTS - 1, r); 159 160 for (i = 0; i < 2; ++i) { 161 nmv_component *const comp_ctx = &ctx->comps[i]; 162 update_mv_probs(&comp_ctx->sign, 1, r); 163 update_mv_probs(comp_ctx->classes, MV_CLASSES - 1, r); 164 update_mv_probs(comp_ctx->class0, CLASS0_SIZE - 1, r); 165 update_mv_probs(comp_ctx->bits, MV_OFFSET_BITS, r); 166 } 167 168 for (i = 0; i < 2; ++i) { 169 nmv_component *const comp_ctx = &ctx->comps[i]; 170 for (j = 0; j < CLASS0_SIZE; ++j) 171 update_mv_probs(comp_ctx->class0_fp[j], MV_FP_SIZE - 1, r); 172 update_mv_probs(comp_ctx->fp, 3, r); 173 } 174 175 if (allow_hp) { 176 for (i = 0; i < 2; ++i) { 177 nmv_component *const comp_ctx = &ctx->comps[i]; 178 update_mv_probs(&comp_ctx->class0_hp, 1, r); 179 update_mv_probs(&comp_ctx->hp, 1, r); 180 } 181 } 182 } 183 184 static void inverse_transform_block_inter(MACROBLOCKD *xd, int plane, 185 const TX_SIZE tx_size, uint8_t *dst, 186 int stride, int eob) { 187 struct macroblockd_plane *const pd = &xd->plane[plane]; 188 tran_low_t *const dqcoeff = pd->dqcoeff; 189 assert(eob > 0); 190 #if CONFIG_VP9_HIGHBITDEPTH 191 if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) { 192 uint16_t *const dst16 = CONVERT_TO_SHORTPTR(dst); 193 if (xd->lossless) { 194 vp9_highbd_iwht4x4_add(dqcoeff, dst16, stride, eob, xd->bd); 195 } else { 196 switch (tx_size) { 197 case TX_4X4: 198 vp9_highbd_idct4x4_add(dqcoeff, dst16, stride, eob, xd->bd); 199 break; 200 case TX_8X8: 201 vp9_highbd_idct8x8_add(dqcoeff, dst16, stride, eob, xd->bd); 202 break; 203 case TX_16X16: 204 vp9_highbd_idct16x16_add(dqcoeff, dst16, stride, eob, xd->bd); 205 break; 206 case TX_32X32: 207 vp9_highbd_idct32x32_add(dqcoeff, dst16, stride, eob, xd->bd); 208 break; 209 default: assert(0 && "Invalid transform size"); 210 } 211 } 212 } else { 213 if (xd->lossless) { 214 vp9_iwht4x4_add(dqcoeff, dst, stride, eob); 215 } else { 216 switch (tx_size) { 217 case TX_4X4: vp9_idct4x4_add(dqcoeff, dst, stride, eob); break; 218 case TX_8X8: vp9_idct8x8_add(dqcoeff, dst, stride, eob); break; 219 case TX_16X16: vp9_idct16x16_add(dqcoeff, dst, stride, eob); break; 220 case TX_32X32: vp9_idct32x32_add(dqcoeff, dst, stride, eob); break; 221 default: assert(0 && "Invalid transform size"); return; 222 } 223 } 224 } 225 #else 226 if (xd->lossless) { 227 vp9_iwht4x4_add(dqcoeff, dst, stride, eob); 228 } else { 229 switch (tx_size) { 230 case TX_4X4: vp9_idct4x4_add(dqcoeff, dst, stride, eob); break; 231 case TX_8X8: vp9_idct8x8_add(dqcoeff, dst, stride, eob); break; 232 case TX_16X16: vp9_idct16x16_add(dqcoeff, dst, stride, eob); break; 233 case TX_32X32: vp9_idct32x32_add(dqcoeff, dst, stride, eob); break; 234 default: assert(0 && "Invalid transform size"); return; 235 } 236 } 237 #endif // CONFIG_VP9_HIGHBITDEPTH 238 239 if (eob == 1) { 240 dqcoeff[0] = 0; 241 } else { 242 if (tx_size <= TX_16X16 && eob <= 10) 243 memset(dqcoeff, 0, 4 * (4 << tx_size) * sizeof(dqcoeff[0])); 244 else if (tx_size == TX_32X32 && eob <= 34) 245 memset(dqcoeff, 0, 256 * sizeof(dqcoeff[0])); 246 else 247 memset(dqcoeff, 0, (16 << (tx_size << 1)) * sizeof(dqcoeff[0])); 248 } 249 } 250 251 static void inverse_transform_block_intra(MACROBLOCKD *xd, int plane, 252 const TX_TYPE tx_type, 253 const TX_SIZE tx_size, uint8_t *dst, 254 int stride, int eob) { 255 struct macroblockd_plane *const pd = &xd->plane[plane]; 256 tran_low_t *const dqcoeff = pd->dqcoeff; 257 assert(eob > 0); 258 #if CONFIG_VP9_HIGHBITDEPTH 259 if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) { 260 uint16_t *const dst16 = CONVERT_TO_SHORTPTR(dst); 261 if (xd->lossless) { 262 vp9_highbd_iwht4x4_add(dqcoeff, dst16, stride, eob, xd->bd); 263 } else { 264 switch (tx_size) { 265 case TX_4X4: 266 vp9_highbd_iht4x4_add(tx_type, dqcoeff, dst16, stride, eob, xd->bd); 267 break; 268 case TX_8X8: 269 vp9_highbd_iht8x8_add(tx_type, dqcoeff, dst16, stride, eob, xd->bd); 270 break; 271 case TX_16X16: 272 vp9_highbd_iht16x16_add(tx_type, dqcoeff, dst16, stride, eob, xd->bd); 273 break; 274 case TX_32X32: 275 vp9_highbd_idct32x32_add(dqcoeff, dst16, stride, eob, xd->bd); 276 break; 277 default: assert(0 && "Invalid transform size"); 278 } 279 } 280 } else { 281 if (xd->lossless) { 282 vp9_iwht4x4_add(dqcoeff, dst, stride, eob); 283 } else { 284 switch (tx_size) { 285 case TX_4X4: vp9_iht4x4_add(tx_type, dqcoeff, dst, stride, eob); break; 286 case TX_8X8: vp9_iht8x8_add(tx_type, dqcoeff, dst, stride, eob); break; 287 case TX_16X16: 288 vp9_iht16x16_add(tx_type, dqcoeff, dst, stride, eob); 289 break; 290 case TX_32X32: vp9_idct32x32_add(dqcoeff, dst, stride, eob); break; 291 default: assert(0 && "Invalid transform size"); return; 292 } 293 } 294 } 295 #else 296 if (xd->lossless) { 297 vp9_iwht4x4_add(dqcoeff, dst, stride, eob); 298 } else { 299 switch (tx_size) { 300 case TX_4X4: vp9_iht4x4_add(tx_type, dqcoeff, dst, stride, eob); break; 301 case TX_8X8: vp9_iht8x8_add(tx_type, dqcoeff, dst, stride, eob); break; 302 case TX_16X16: 303 vp9_iht16x16_add(tx_type, dqcoeff, dst, stride, eob); 304 break; 305 case TX_32X32: vp9_idct32x32_add(dqcoeff, dst, stride, eob); break; 306 default: assert(0 && "Invalid transform size"); return; 307 } 308 } 309 #endif // CONFIG_VP9_HIGHBITDEPTH 310 311 if (eob == 1) { 312 dqcoeff[0] = 0; 313 } else { 314 if (tx_type == DCT_DCT && tx_size <= TX_16X16 && eob <= 10) 315 memset(dqcoeff, 0, 4 * (4 << tx_size) * sizeof(dqcoeff[0])); 316 else if (tx_size == TX_32X32 && eob <= 34) 317 memset(dqcoeff, 0, 256 * sizeof(dqcoeff[0])); 318 else 319 memset(dqcoeff, 0, (16 << (tx_size << 1)) * sizeof(dqcoeff[0])); 320 } 321 } 322 323 static void predict_and_reconstruct_intra_block(TileWorkerData *twd, 324 MODE_INFO *const mi, int plane, 325 int row, int col, 326 TX_SIZE tx_size) { 327 MACROBLOCKD *const xd = &twd->xd; 328 struct macroblockd_plane *const pd = &xd->plane[plane]; 329 PREDICTION_MODE mode = (plane == 0) ? mi->mode : mi->uv_mode; 330 uint8_t *dst; 331 dst = &pd->dst.buf[4 * row * pd->dst.stride + 4 * col]; 332 333 if (mi->sb_type < BLOCK_8X8) 334 if (plane == 0) mode = xd->mi[0]->bmi[(row << 1) + col].as_mode; 335 336 vp9_predict_intra_block(xd, pd->n4_wl, tx_size, mode, dst, pd->dst.stride, 337 dst, pd->dst.stride, col, row, plane); 338 339 if (!mi->skip) { 340 const TX_TYPE tx_type = 341 (plane || xd->lossless) ? DCT_DCT : intra_mode_to_tx_type_lookup[mode]; 342 const scan_order *sc = (plane || xd->lossless) 343 ? &vp9_default_scan_orders[tx_size] 344 : &vp9_scan_orders[tx_size][tx_type]; 345 const int eob = vp9_decode_block_tokens(twd, plane, sc, col, row, tx_size, 346 mi->segment_id); 347 if (eob > 0) { 348 inverse_transform_block_intra(xd, plane, tx_type, tx_size, dst, 349 pd->dst.stride, eob); 350 } 351 } 352 } 353 354 static int reconstruct_inter_block(TileWorkerData *twd, MODE_INFO *const mi, 355 int plane, int row, int col, 356 TX_SIZE tx_size) { 357 MACROBLOCKD *const xd = &twd->xd; 358 struct macroblockd_plane *const pd = &xd->plane[plane]; 359 const scan_order *sc = &vp9_default_scan_orders[tx_size]; 360 const int eob = vp9_decode_block_tokens(twd, plane, sc, col, row, tx_size, 361 mi->segment_id); 362 363 if (eob > 0) { 364 inverse_transform_block_inter( 365 xd, plane, tx_size, &pd->dst.buf[4 * row * pd->dst.stride + 4 * col], 366 pd->dst.stride, eob); 367 } 368 return eob; 369 } 370 371 static void build_mc_border(const uint8_t *src, int src_stride, uint8_t *dst, 372 int dst_stride, int x, int y, int b_w, int b_h, 373 int w, int h) { 374 // Get a pointer to the start of the real data for this row. 375 const uint8_t *ref_row = src - x - y * src_stride; 376 377 if (y >= h) 378 ref_row += (h - 1) * src_stride; 379 else if (y > 0) 380 ref_row += y * src_stride; 381 382 do { 383 int right = 0, copy; 384 int left = x < 0 ? -x : 0; 385 386 if (left > b_w) left = b_w; 387 388 if (x + b_w > w) right = x + b_w - w; 389 390 if (right > b_w) right = b_w; 391 392 copy = b_w - left - right; 393 394 if (left) memset(dst, ref_row[0], left); 395 396 if (copy) memcpy(dst + left, ref_row + x + left, copy); 397 398 if (right) memset(dst + left + copy, ref_row[w - 1], right); 399 400 dst += dst_stride; 401 ++y; 402 403 if (y > 0 && y < h) ref_row += src_stride; 404 } while (--b_h); 405 } 406 407 #if CONFIG_VP9_HIGHBITDEPTH 408 static void high_build_mc_border(const uint8_t *src8, int src_stride, 409 uint16_t *dst, int dst_stride, int x, int y, 410 int b_w, int b_h, int w, int h) { 411 // Get a pointer to the start of the real data for this row. 412 const uint16_t *src = CONVERT_TO_SHORTPTR(src8); 413 const uint16_t *ref_row = src - x - y * src_stride; 414 415 if (y >= h) 416 ref_row += (h - 1) * src_stride; 417 else if (y > 0) 418 ref_row += y * src_stride; 419 420 do { 421 int right = 0, copy; 422 int left = x < 0 ? -x : 0; 423 424 if (left > b_w) left = b_w; 425 426 if (x + b_w > w) right = x + b_w - w; 427 428 if (right > b_w) right = b_w; 429 430 copy = b_w - left - right; 431 432 if (left) vpx_memset16(dst, ref_row[0], left); 433 434 if (copy) memcpy(dst + left, ref_row + x + left, copy * sizeof(uint16_t)); 435 436 if (right) vpx_memset16(dst + left + copy, ref_row[w - 1], right); 437 438 dst += dst_stride; 439 ++y; 440 441 if (y > 0 && y < h) ref_row += src_stride; 442 } while (--b_h); 443 } 444 #endif // CONFIG_VP9_HIGHBITDEPTH 445 446 #if CONFIG_VP9_HIGHBITDEPTH 447 static void extend_and_predict(const uint8_t *buf_ptr1, int pre_buf_stride, 448 int x0, int y0, int b_w, int b_h, 449 int frame_width, int frame_height, 450 int border_offset, uint8_t *const dst, 451 int dst_buf_stride, int subpel_x, int subpel_y, 452 const InterpKernel *kernel, 453 const struct scale_factors *sf, MACROBLOCKD *xd, 454 int w, int h, int ref, int xs, int ys) { 455 DECLARE_ALIGNED(16, uint16_t, mc_buf_high[80 * 2 * 80 * 2]); 456 457 if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) { 458 high_build_mc_border(buf_ptr1, pre_buf_stride, mc_buf_high, b_w, x0, y0, 459 b_w, b_h, frame_width, frame_height); 460 highbd_inter_predictor(mc_buf_high + border_offset, b_w, 461 CONVERT_TO_SHORTPTR(dst), dst_buf_stride, subpel_x, 462 subpel_y, sf, w, h, ref, kernel, xs, ys, xd->bd); 463 } else { 464 build_mc_border(buf_ptr1, pre_buf_stride, (uint8_t *)mc_buf_high, b_w, x0, 465 y0, b_w, b_h, frame_width, frame_height); 466 inter_predictor(((uint8_t *)mc_buf_high) + border_offset, b_w, dst, 467 dst_buf_stride, subpel_x, subpel_y, sf, w, h, ref, kernel, 468 xs, ys); 469 } 470 } 471 #else 472 static void extend_and_predict(const uint8_t *buf_ptr1, int pre_buf_stride, 473 int x0, int y0, int b_w, int b_h, 474 int frame_width, int frame_height, 475 int border_offset, uint8_t *const dst, 476 int dst_buf_stride, int subpel_x, int subpel_y, 477 const InterpKernel *kernel, 478 const struct scale_factors *sf, int w, int h, 479 int ref, int xs, int ys) { 480 DECLARE_ALIGNED(16, uint8_t, mc_buf[80 * 2 * 80 * 2]); 481 const uint8_t *buf_ptr; 482 483 build_mc_border(buf_ptr1, pre_buf_stride, mc_buf, b_w, x0, y0, b_w, b_h, 484 frame_width, frame_height); 485 buf_ptr = mc_buf + border_offset; 486 487 inter_predictor(buf_ptr, b_w, dst, dst_buf_stride, subpel_x, subpel_y, sf, w, 488 h, ref, kernel, xs, ys); 489 } 490 #endif // CONFIG_VP9_HIGHBITDEPTH 491 492 static void dec_build_inter_predictors( 493 VPxWorker *const worker, MACROBLOCKD *xd, int plane, int bw, int bh, int x, 494 int y, int w, int h, int mi_x, int mi_y, const InterpKernel *kernel, 495 const struct scale_factors *sf, struct buf_2d *pre_buf, 496 struct buf_2d *dst_buf, const MV *mv, RefCntBuffer *ref_frame_buf, 497 int is_scaled, int ref) { 498 struct macroblockd_plane *const pd = &xd->plane[plane]; 499 uint8_t *const dst = dst_buf->buf + dst_buf->stride * y + x; 500 MV32 scaled_mv; 501 int xs, ys, x0, y0, x0_16, y0_16, frame_width, frame_height, buf_stride, 502 subpel_x, subpel_y; 503 uint8_t *ref_frame, *buf_ptr; 504 505 // Get reference frame pointer, width and height. 506 if (plane == 0) { 507 frame_width = ref_frame_buf->buf.y_crop_width; 508 frame_height = ref_frame_buf->buf.y_crop_height; 509 ref_frame = ref_frame_buf->buf.y_buffer; 510 } else { 511 frame_width = ref_frame_buf->buf.uv_crop_width; 512 frame_height = ref_frame_buf->buf.uv_crop_height; 513 ref_frame = 514 plane == 1 ? ref_frame_buf->buf.u_buffer : ref_frame_buf->buf.v_buffer; 515 } 516 517 if (is_scaled) { 518 const MV mv_q4 = clamp_mv_to_umv_border_sb( 519 xd, mv, bw, bh, pd->subsampling_x, pd->subsampling_y); 520 // Co-ordinate of containing block to pixel precision. 521 int x_start = (-xd->mb_to_left_edge >> (3 + pd->subsampling_x)); 522 int y_start = (-xd->mb_to_top_edge >> (3 + pd->subsampling_y)); 523 #if 0 // CONFIG_BETTER_HW_COMPATIBILITY 524 assert(xd->mi[0]->sb_type != BLOCK_4X8 && 525 xd->mi[0]->sb_type != BLOCK_8X4); 526 assert(mv_q4.row == mv->row * (1 << (1 - pd->subsampling_y)) && 527 mv_q4.col == mv->col * (1 << (1 - pd->subsampling_x))); 528 #endif 529 // Co-ordinate of the block to 1/16th pixel precision. 530 x0_16 = (x_start + x) << SUBPEL_BITS; 531 y0_16 = (y_start + y) << SUBPEL_BITS; 532 533 // Co-ordinate of current block in reference frame 534 // to 1/16th pixel precision. 535 x0_16 = sf->scale_value_x(x0_16, sf); 536 y0_16 = sf->scale_value_y(y0_16, sf); 537 538 // Map the top left corner of the block into the reference frame. 539 x0 = sf->scale_value_x(x_start + x, sf); 540 y0 = sf->scale_value_y(y_start + y, sf); 541 542 // Scale the MV and incorporate the sub-pixel offset of the block 543 // in the reference frame. 544 scaled_mv = vp9_scale_mv(&mv_q4, mi_x + x, mi_y + y, sf); 545 xs = sf->x_step_q4; 546 ys = sf->y_step_q4; 547 } else { 548 // Co-ordinate of containing block to pixel precision. 549 x0 = (-xd->mb_to_left_edge >> (3 + pd->subsampling_x)) + x; 550 y0 = (-xd->mb_to_top_edge >> (3 + pd->subsampling_y)) + y; 551 552 // Co-ordinate of the block to 1/16th pixel precision. 553 x0_16 = x0 << SUBPEL_BITS; 554 y0_16 = y0 << SUBPEL_BITS; 555 556 scaled_mv.row = mv->row * (1 << (1 - pd->subsampling_y)); 557 scaled_mv.col = mv->col * (1 << (1 - pd->subsampling_x)); 558 xs = ys = 16; 559 } 560 subpel_x = scaled_mv.col & SUBPEL_MASK; 561 subpel_y = scaled_mv.row & SUBPEL_MASK; 562 563 // Calculate the top left corner of the best matching block in the 564 // reference frame. 565 x0 += scaled_mv.col >> SUBPEL_BITS; 566 y0 += scaled_mv.row >> SUBPEL_BITS; 567 x0_16 += scaled_mv.col; 568 y0_16 += scaled_mv.row; 569 570 // Get reference block pointer. 571 buf_ptr = ref_frame + y0 * pre_buf->stride + x0; 572 buf_stride = pre_buf->stride; 573 574 // Do border extension if there is motion or the 575 // width/height is not a multiple of 8 pixels. 576 if (is_scaled || scaled_mv.col || scaled_mv.row || (frame_width & 0x7) || 577 (frame_height & 0x7)) { 578 int y1 = ((y0_16 + (h - 1) * ys) >> SUBPEL_BITS) + 1; 579 580 // Get reference block bottom right horizontal coordinate. 581 int x1 = ((x0_16 + (w - 1) * xs) >> SUBPEL_BITS) + 1; 582 int x_pad = 0, y_pad = 0; 583 584 if (subpel_x || (sf->x_step_q4 != SUBPEL_SHIFTS)) { 585 x0 -= VP9_INTERP_EXTEND - 1; 586 x1 += VP9_INTERP_EXTEND; 587 x_pad = 1; 588 } 589 590 if (subpel_y || (sf->y_step_q4 != SUBPEL_SHIFTS)) { 591 y0 -= VP9_INTERP_EXTEND - 1; 592 y1 += VP9_INTERP_EXTEND; 593 y_pad = 1; 594 } 595 596 // Wait until reference block is ready. Pad 7 more pixels as last 7 597 // pixels of each superblock row can be changed by next superblock row. 598 if (worker != NULL) 599 vp9_frameworker_wait(worker, ref_frame_buf, VPXMAX(0, (y1 + 7)) 600 << (plane == 0 ? 0 : 1)); 601 602 // Skip border extension if block is inside the frame. 603 if (x0 < 0 || x0 > frame_width - 1 || x1 < 0 || x1 > frame_width - 1 || 604 y0 < 0 || y0 > frame_height - 1 || y1 < 0 || y1 > frame_height - 1) { 605 // Extend the border. 606 const uint8_t *const buf_ptr1 = ref_frame + y0 * buf_stride + x0; 607 const int b_w = x1 - x0 + 1; 608 const int b_h = y1 - y0 + 1; 609 const int border_offset = y_pad * 3 * b_w + x_pad * 3; 610 611 extend_and_predict(buf_ptr1, buf_stride, x0, y0, b_w, b_h, frame_width, 612 frame_height, border_offset, dst, dst_buf->stride, 613 subpel_x, subpel_y, kernel, sf, 614 #if CONFIG_VP9_HIGHBITDEPTH 615 xd, 616 #endif 617 w, h, ref, xs, ys); 618 return; 619 } 620 } else { 621 // Wait until reference block is ready. Pad 7 more pixels as last 7 622 // pixels of each superblock row can be changed by next superblock row. 623 if (worker != NULL) { 624 const int y1 = (y0_16 + (h - 1) * ys) >> SUBPEL_BITS; 625 vp9_frameworker_wait(worker, ref_frame_buf, VPXMAX(0, (y1 + 7)) 626 << (plane == 0 ? 0 : 1)); 627 } 628 } 629 #if CONFIG_VP9_HIGHBITDEPTH 630 if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) { 631 highbd_inter_predictor(CONVERT_TO_SHORTPTR(buf_ptr), buf_stride, 632 CONVERT_TO_SHORTPTR(dst), dst_buf->stride, subpel_x, 633 subpel_y, sf, w, h, ref, kernel, xs, ys, xd->bd); 634 } else { 635 inter_predictor(buf_ptr, buf_stride, dst, dst_buf->stride, subpel_x, 636 subpel_y, sf, w, h, ref, kernel, xs, ys); 637 } 638 #else 639 inter_predictor(buf_ptr, buf_stride, dst, dst_buf->stride, subpel_x, subpel_y, 640 sf, w, h, ref, kernel, xs, ys); 641 #endif // CONFIG_VP9_HIGHBITDEPTH 642 } 643 644 static void dec_build_inter_predictors_sb(VP9Decoder *const pbi, 645 MACROBLOCKD *xd, int mi_row, 646 int mi_col) { 647 int plane; 648 const int mi_x = mi_col * MI_SIZE; 649 const int mi_y = mi_row * MI_SIZE; 650 const MODE_INFO *mi = xd->mi[0]; 651 const InterpKernel *kernel = vp9_filter_kernels[mi->interp_filter]; 652 const BLOCK_SIZE sb_type = mi->sb_type; 653 const int is_compound = has_second_ref(mi); 654 int ref; 655 int is_scaled; 656 VPxWorker *const fwo = 657 pbi->frame_parallel_decode ? pbi->frame_worker_owner : NULL; 658 659 for (ref = 0; ref < 1 + is_compound; ++ref) { 660 const MV_REFERENCE_FRAME frame = mi->ref_frame[ref]; 661 RefBuffer *ref_buf = &pbi->common.frame_refs[frame - LAST_FRAME]; 662 const struct scale_factors *const sf = &ref_buf->sf; 663 const int idx = ref_buf->idx; 664 BufferPool *const pool = pbi->common.buffer_pool; 665 RefCntBuffer *const ref_frame_buf = &pool->frame_bufs[idx]; 666 667 if (!vp9_is_valid_scale(sf)) 668 vpx_internal_error(xd->error_info, VPX_CODEC_UNSUP_BITSTREAM, 669 "Reference frame has invalid dimensions"); 670 671 is_scaled = vp9_is_scaled(sf); 672 vp9_setup_pre_planes(xd, ref, ref_buf->buf, mi_row, mi_col, 673 is_scaled ? sf : NULL); 674 xd->block_refs[ref] = ref_buf; 675 676 if (sb_type < BLOCK_8X8) { 677 for (plane = 0; plane < MAX_MB_PLANE; ++plane) { 678 struct macroblockd_plane *const pd = &xd->plane[plane]; 679 struct buf_2d *const dst_buf = &pd->dst; 680 const int num_4x4_w = pd->n4_w; 681 const int num_4x4_h = pd->n4_h; 682 const int n4w_x4 = 4 * num_4x4_w; 683 const int n4h_x4 = 4 * num_4x4_h; 684 struct buf_2d *const pre_buf = &pd->pre[ref]; 685 int i = 0, x, y; 686 for (y = 0; y < num_4x4_h; ++y) { 687 for (x = 0; x < num_4x4_w; ++x) { 688 const MV mv = average_split_mvs(pd, mi, ref, i++); 689 dec_build_inter_predictors(fwo, xd, plane, n4w_x4, n4h_x4, 4 * x, 690 4 * y, 4, 4, mi_x, mi_y, kernel, sf, 691 pre_buf, dst_buf, &mv, ref_frame_buf, 692 is_scaled, ref); 693 } 694 } 695 } 696 } else { 697 const MV mv = mi->mv[ref].as_mv; 698 for (plane = 0; plane < MAX_MB_PLANE; ++plane) { 699 struct macroblockd_plane *const pd = &xd->plane[plane]; 700 struct buf_2d *const dst_buf = &pd->dst; 701 const int num_4x4_w = pd->n4_w; 702 const int num_4x4_h = pd->n4_h; 703 const int n4w_x4 = 4 * num_4x4_w; 704 const int n4h_x4 = 4 * num_4x4_h; 705 struct buf_2d *const pre_buf = &pd->pre[ref]; 706 dec_build_inter_predictors(fwo, xd, plane, n4w_x4, n4h_x4, 0, 0, n4w_x4, 707 n4h_x4, mi_x, mi_y, kernel, sf, pre_buf, 708 dst_buf, &mv, ref_frame_buf, is_scaled, ref); 709 } 710 } 711 } 712 } 713 714 static INLINE void dec_reset_skip_context(MACROBLOCKD *xd) { 715 int i; 716 for (i = 0; i < MAX_MB_PLANE; i++) { 717 struct macroblockd_plane *const pd = &xd->plane[i]; 718 memset(pd->above_context, 0, sizeof(ENTROPY_CONTEXT) * pd->n4_w); 719 memset(pd->left_context, 0, sizeof(ENTROPY_CONTEXT) * pd->n4_h); 720 } 721 } 722 723 static void set_plane_n4(MACROBLOCKD *const xd, int bw, int bh, int bwl, 724 int bhl) { 725 int i; 726 for (i = 0; i < MAX_MB_PLANE; i++) { 727 xd->plane[i].n4_w = (bw << 1) >> xd->plane[i].subsampling_x; 728 xd->plane[i].n4_h = (bh << 1) >> xd->plane[i].subsampling_y; 729 xd->plane[i].n4_wl = bwl - xd->plane[i].subsampling_x; 730 xd->plane[i].n4_hl = bhl - xd->plane[i].subsampling_y; 731 } 732 } 733 734 static MODE_INFO *set_offsets(VP9_COMMON *const cm, MACROBLOCKD *const xd, 735 BLOCK_SIZE bsize, int mi_row, int mi_col, int bw, 736 int bh, int x_mis, int y_mis, int bwl, int bhl) { 737 const int offset = mi_row * cm->mi_stride + mi_col; 738 int x, y; 739 const TileInfo *const tile = &xd->tile; 740 741 xd->mi = cm->mi_grid_visible + offset; 742 xd->mi[0] = &cm->mi[offset]; 743 // TODO(slavarnway): Generate sb_type based on bwl and bhl, instead of 744 // passing bsize from decode_partition(). 745 xd->mi[0]->sb_type = bsize; 746 for (y = 0; y < y_mis; ++y) 747 for (x = !y; x < x_mis; ++x) { 748 xd->mi[y * cm->mi_stride + x] = xd->mi[0]; 749 } 750 751 set_plane_n4(xd, bw, bh, bwl, bhl); 752 753 set_skip_context(xd, mi_row, mi_col); 754 755 // Distance of Mb to the various image edges. These are specified to 8th pel 756 // as they are always compared to values that are in 1/8th pel units 757 set_mi_row_col(xd, tile, mi_row, bh, mi_col, bw, cm->mi_rows, cm->mi_cols); 758 759 vp9_setup_dst_planes(xd->plane, get_frame_new_buffer(cm), mi_row, mi_col); 760 return xd->mi[0]; 761 } 762 763 static void decode_block(TileWorkerData *twd, VP9Decoder *const pbi, int mi_row, 764 int mi_col, BLOCK_SIZE bsize, int bwl, int bhl) { 765 VP9_COMMON *const cm = &pbi->common; 766 const int less8x8 = bsize < BLOCK_8X8; 767 const int bw = 1 << (bwl - 1); 768 const int bh = 1 << (bhl - 1); 769 const int x_mis = VPXMIN(bw, cm->mi_cols - mi_col); 770 const int y_mis = VPXMIN(bh, cm->mi_rows - mi_row); 771 vpx_reader *r = &twd->bit_reader; 772 MACROBLOCKD *const xd = &twd->xd; 773 774 MODE_INFO *mi = set_offsets(cm, xd, bsize, mi_row, mi_col, bw, bh, x_mis, 775 y_mis, bwl, bhl); 776 777 if (bsize >= BLOCK_8X8 && (cm->subsampling_x || cm->subsampling_y)) { 778 const BLOCK_SIZE uv_subsize = 779 ss_size_lookup[bsize][cm->subsampling_x][cm->subsampling_y]; 780 if (uv_subsize == BLOCK_INVALID) 781 vpx_internal_error(xd->error_info, VPX_CODEC_CORRUPT_FRAME, 782 "Invalid block size."); 783 } 784 785 vp9_read_mode_info(twd, pbi, mi_row, mi_col, x_mis, y_mis); 786 787 if (mi->skip) { 788 dec_reset_skip_context(xd); 789 } 790 791 if (!is_inter_block(mi)) { 792 int plane; 793 for (plane = 0; plane < MAX_MB_PLANE; ++plane) { 794 const struct macroblockd_plane *const pd = &xd->plane[plane]; 795 const TX_SIZE tx_size = plane ? get_uv_tx_size(mi, pd) : mi->tx_size; 796 const int num_4x4_w = pd->n4_w; 797 const int num_4x4_h = pd->n4_h; 798 const int step = (1 << tx_size); 799 int row, col; 800 const int max_blocks_wide = 801 num_4x4_w + (xd->mb_to_right_edge >= 0 802 ? 0 803 : xd->mb_to_right_edge >> (5 + pd->subsampling_x)); 804 const int max_blocks_high = 805 num_4x4_h + (xd->mb_to_bottom_edge >= 0 806 ? 0 807 : xd->mb_to_bottom_edge >> (5 + pd->subsampling_y)); 808 809 xd->max_blocks_wide = xd->mb_to_right_edge >= 0 ? 0 : max_blocks_wide; 810 xd->max_blocks_high = xd->mb_to_bottom_edge >= 0 ? 0 : max_blocks_high; 811 812 for (row = 0; row < max_blocks_high; row += step) 813 for (col = 0; col < max_blocks_wide; col += step) 814 predict_and_reconstruct_intra_block(twd, mi, plane, row, col, 815 tx_size); 816 } 817 } else { 818 // Prediction 819 dec_build_inter_predictors_sb(pbi, xd, mi_row, mi_col); 820 821 // Reconstruction 822 if (!mi->skip) { 823 int eobtotal = 0; 824 int plane; 825 826 for (plane = 0; plane < MAX_MB_PLANE; ++plane) { 827 const struct macroblockd_plane *const pd = &xd->plane[plane]; 828 const TX_SIZE tx_size = plane ? get_uv_tx_size(mi, pd) : mi->tx_size; 829 const int num_4x4_w = pd->n4_w; 830 const int num_4x4_h = pd->n4_h; 831 const int step = (1 << tx_size); 832 int row, col; 833 const int max_blocks_wide = 834 num_4x4_w + (xd->mb_to_right_edge >= 0 835 ? 0 836 : xd->mb_to_right_edge >> (5 + pd->subsampling_x)); 837 const int max_blocks_high = 838 num_4x4_h + 839 (xd->mb_to_bottom_edge >= 0 840 ? 0 841 : xd->mb_to_bottom_edge >> (5 + pd->subsampling_y)); 842 843 xd->max_blocks_wide = xd->mb_to_right_edge >= 0 ? 0 : max_blocks_wide; 844 xd->max_blocks_high = xd->mb_to_bottom_edge >= 0 ? 0 : max_blocks_high; 845 846 for (row = 0; row < max_blocks_high; row += step) 847 for (col = 0; col < max_blocks_wide; col += step) 848 eobtotal += 849 reconstruct_inter_block(twd, mi, plane, row, col, tx_size); 850 } 851 852 if (!less8x8 && eobtotal == 0) mi->skip = 1; // skip loopfilter 853 } 854 } 855 856 xd->corrupted |= vpx_reader_has_error(r); 857 858 if (cm->lf.filter_level) { 859 vp9_build_mask(cm, mi, mi_row, mi_col, bw, bh); 860 } 861 } 862 863 static INLINE int dec_partition_plane_context(TileWorkerData *twd, int mi_row, 864 int mi_col, int bsl) { 865 const PARTITION_CONTEXT *above_ctx = twd->xd.above_seg_context + mi_col; 866 const PARTITION_CONTEXT *left_ctx = 867 twd->xd.left_seg_context + (mi_row & MI_MASK); 868 int above = (*above_ctx >> bsl) & 1, left = (*left_ctx >> bsl) & 1; 869 870 // assert(bsl >= 0); 871 872 return (left * 2 + above) + bsl * PARTITION_PLOFFSET; 873 } 874 875 static INLINE void dec_update_partition_context(TileWorkerData *twd, int mi_row, 876 int mi_col, BLOCK_SIZE subsize, 877 int bw) { 878 PARTITION_CONTEXT *const above_ctx = twd->xd.above_seg_context + mi_col; 879 PARTITION_CONTEXT *const left_ctx = 880 twd->xd.left_seg_context + (mi_row & MI_MASK); 881 882 // update the partition context at the end notes. set partition bits 883 // of block sizes larger than the current one to be one, and partition 884 // bits of smaller block sizes to be zero. 885 memset(above_ctx, partition_context_lookup[subsize].above, bw); 886 memset(left_ctx, partition_context_lookup[subsize].left, bw); 887 } 888 889 static PARTITION_TYPE read_partition(TileWorkerData *twd, int mi_row, 890 int mi_col, int has_rows, int has_cols, 891 int bsl) { 892 const int ctx = dec_partition_plane_context(twd, mi_row, mi_col, bsl); 893 const vpx_prob *const probs = twd->xd.partition_probs[ctx]; 894 FRAME_COUNTS *counts = twd->xd.counts; 895 PARTITION_TYPE p; 896 vpx_reader *r = &twd->bit_reader; 897 898 if (has_rows && has_cols) 899 p = (PARTITION_TYPE)vpx_read_tree(r, vp9_partition_tree, probs); 900 else if (!has_rows && has_cols) 901 p = vpx_read(r, probs[1]) ? PARTITION_SPLIT : PARTITION_HORZ; 902 else if (has_rows && !has_cols) 903 p = vpx_read(r, probs[2]) ? PARTITION_SPLIT : PARTITION_VERT; 904 else 905 p = PARTITION_SPLIT; 906 907 if (counts) ++counts->partition[ctx][p]; 908 909 return p; 910 } 911 912 // TODO(slavarnway): eliminate bsize and subsize in future commits 913 static void decode_partition(TileWorkerData *twd, VP9Decoder *const pbi, 914 int mi_row, int mi_col, BLOCK_SIZE bsize, 915 int n4x4_l2) { 916 VP9_COMMON *const cm = &pbi->common; 917 const int n8x8_l2 = n4x4_l2 - 1; 918 const int num_8x8_wh = 1 << n8x8_l2; 919 const int hbs = num_8x8_wh >> 1; 920 PARTITION_TYPE partition; 921 BLOCK_SIZE subsize; 922 const int has_rows = (mi_row + hbs) < cm->mi_rows; 923 const int has_cols = (mi_col + hbs) < cm->mi_cols; 924 MACROBLOCKD *const xd = &twd->xd; 925 926 if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols) return; 927 928 partition = read_partition(twd, mi_row, mi_col, has_rows, has_cols, n8x8_l2); 929 subsize = subsize_lookup[partition][bsize]; // get_subsize(bsize, partition); 930 if (!hbs) { 931 // calculate bmode block dimensions (log 2) 932 xd->bmode_blocks_wl = 1 >> !!(partition & PARTITION_VERT); 933 xd->bmode_blocks_hl = 1 >> !!(partition & PARTITION_HORZ); 934 decode_block(twd, pbi, mi_row, mi_col, subsize, 1, 1); 935 } else { 936 switch (partition) { 937 case PARTITION_NONE: 938 decode_block(twd, pbi, mi_row, mi_col, subsize, n4x4_l2, n4x4_l2); 939 break; 940 case PARTITION_HORZ: 941 decode_block(twd, pbi, mi_row, mi_col, subsize, n4x4_l2, n8x8_l2); 942 if (has_rows) 943 decode_block(twd, pbi, mi_row + hbs, mi_col, subsize, n4x4_l2, 944 n8x8_l2); 945 break; 946 case PARTITION_VERT: 947 decode_block(twd, pbi, mi_row, mi_col, subsize, n8x8_l2, n4x4_l2); 948 if (has_cols) 949 decode_block(twd, pbi, mi_row, mi_col + hbs, subsize, n8x8_l2, 950 n4x4_l2); 951 break; 952 case PARTITION_SPLIT: 953 decode_partition(twd, pbi, mi_row, mi_col, subsize, n8x8_l2); 954 decode_partition(twd, pbi, mi_row, mi_col + hbs, subsize, n8x8_l2); 955 decode_partition(twd, pbi, mi_row + hbs, mi_col, subsize, n8x8_l2); 956 decode_partition(twd, pbi, mi_row + hbs, mi_col + hbs, subsize, 957 n8x8_l2); 958 break; 959 default: assert(0 && "Invalid partition type"); 960 } 961 } 962 963 // update partition context 964 if (bsize >= BLOCK_8X8 && 965 (bsize == BLOCK_8X8 || partition != PARTITION_SPLIT)) 966 dec_update_partition_context(twd, mi_row, mi_col, subsize, num_8x8_wh); 967 } 968 969 static void setup_token_decoder(const uint8_t *data, const uint8_t *data_end, 970 size_t read_size, 971 struct vpx_internal_error_info *error_info, 972 vpx_reader *r, vpx_decrypt_cb decrypt_cb, 973 void *decrypt_state) { 974 // Validate the calculated partition length. If the buffer 975 // described by the partition can't be fully read, then restrict 976 // it to the portion that can be (for EC mode) or throw an error. 977 if (!read_is_valid(data, read_size, data_end)) 978 vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME, 979 "Truncated packet or corrupt tile length"); 980 981 if (vpx_reader_init(r, data, read_size, decrypt_cb, decrypt_state)) 982 vpx_internal_error(error_info, VPX_CODEC_MEM_ERROR, 983 "Failed to allocate bool decoder %d", 1); 984 } 985 986 static void read_coef_probs_common(vp9_coeff_probs_model *coef_probs, 987 vpx_reader *r) { 988 int i, j, k, l, m; 989 990 if (vpx_read_bit(r)) 991 for (i = 0; i < PLANE_TYPES; ++i) 992 for (j = 0; j < REF_TYPES; ++j) 993 for (k = 0; k < COEF_BANDS; ++k) 994 for (l = 0; l < BAND_COEFF_CONTEXTS(k); ++l) 995 for (m = 0; m < UNCONSTRAINED_NODES; ++m) 996 vp9_diff_update_prob(r, &coef_probs[i][j][k][l][m]); 997 } 998 999 static void read_coef_probs(FRAME_CONTEXT *fc, TX_MODE tx_mode, vpx_reader *r) { 1000 const TX_SIZE max_tx_size = tx_mode_to_biggest_tx_size[tx_mode]; 1001 TX_SIZE tx_size; 1002 for (tx_size = TX_4X4; tx_size <= max_tx_size; ++tx_size) 1003 read_coef_probs_common(fc->coef_probs[tx_size], r); 1004 } 1005 1006 static void setup_segmentation(struct segmentation *seg, 1007 struct vpx_read_bit_buffer *rb) { 1008 int i, j; 1009 1010 seg->update_map = 0; 1011 seg->update_data = 0; 1012 1013 seg->enabled = vpx_rb_read_bit(rb); 1014 if (!seg->enabled) return; 1015 1016 // Segmentation map update 1017 seg->update_map = vpx_rb_read_bit(rb); 1018 if (seg->update_map) { 1019 for (i = 0; i < SEG_TREE_PROBS; i++) 1020 seg->tree_probs[i] = 1021 vpx_rb_read_bit(rb) ? vpx_rb_read_literal(rb, 8) : MAX_PROB; 1022 1023 seg->temporal_update = vpx_rb_read_bit(rb); 1024 if (seg->temporal_update) { 1025 for (i = 0; i < PREDICTION_PROBS; i++) 1026 seg->pred_probs[i] = 1027 vpx_rb_read_bit(rb) ? vpx_rb_read_literal(rb, 8) : MAX_PROB; 1028 } else { 1029 for (i = 0; i < PREDICTION_PROBS; i++) seg->pred_probs[i] = MAX_PROB; 1030 } 1031 } 1032 1033 // Segmentation data update 1034 seg->update_data = vpx_rb_read_bit(rb); 1035 if (seg->update_data) { 1036 seg->abs_delta = vpx_rb_read_bit(rb); 1037 1038 vp9_clearall_segfeatures(seg); 1039 1040 for (i = 0; i < MAX_SEGMENTS; i++) { 1041 for (j = 0; j < SEG_LVL_MAX; j++) { 1042 int data = 0; 1043 const int feature_enabled = vpx_rb_read_bit(rb); 1044 if (feature_enabled) { 1045 vp9_enable_segfeature(seg, i, j); 1046 data = decode_unsigned_max(rb, vp9_seg_feature_data_max(j)); 1047 if (vp9_is_segfeature_signed(j)) 1048 data = vpx_rb_read_bit(rb) ? -data : data; 1049 } 1050 vp9_set_segdata(seg, i, j, data); 1051 } 1052 } 1053 } 1054 } 1055 1056 static void setup_loopfilter(struct loopfilter *lf, 1057 struct vpx_read_bit_buffer *rb) { 1058 lf->filter_level = vpx_rb_read_literal(rb, 6); 1059 lf->sharpness_level = vpx_rb_read_literal(rb, 3); 1060 1061 // Read in loop filter deltas applied at the MB level based on mode or ref 1062 // frame. 1063 lf->mode_ref_delta_update = 0; 1064 1065 lf->mode_ref_delta_enabled = vpx_rb_read_bit(rb); 1066 if (lf->mode_ref_delta_enabled) { 1067 lf->mode_ref_delta_update = vpx_rb_read_bit(rb); 1068 if (lf->mode_ref_delta_update) { 1069 int i; 1070 1071 for (i = 0; i < MAX_REF_LF_DELTAS; i++) 1072 if (vpx_rb_read_bit(rb)) 1073 lf->ref_deltas[i] = vpx_rb_read_signed_literal(rb, 6); 1074 1075 for (i = 0; i < MAX_MODE_LF_DELTAS; i++) 1076 if (vpx_rb_read_bit(rb)) 1077 lf->mode_deltas[i] = vpx_rb_read_signed_literal(rb, 6); 1078 } 1079 } 1080 } 1081 1082 static INLINE int read_delta_q(struct vpx_read_bit_buffer *rb) { 1083 return vpx_rb_read_bit(rb) ? vpx_rb_read_signed_literal(rb, 4) : 0; 1084 } 1085 1086 static void setup_quantization(VP9_COMMON *const cm, MACROBLOCKD *const xd, 1087 struct vpx_read_bit_buffer *rb) { 1088 cm->base_qindex = vpx_rb_read_literal(rb, QINDEX_BITS); 1089 cm->y_dc_delta_q = read_delta_q(rb); 1090 cm->uv_dc_delta_q = read_delta_q(rb); 1091 cm->uv_ac_delta_q = read_delta_q(rb); 1092 cm->dequant_bit_depth = cm->bit_depth; 1093 xd->lossless = cm->base_qindex == 0 && cm->y_dc_delta_q == 0 && 1094 cm->uv_dc_delta_q == 0 && cm->uv_ac_delta_q == 0; 1095 1096 #if CONFIG_VP9_HIGHBITDEPTH 1097 xd->bd = (int)cm->bit_depth; 1098 #endif 1099 } 1100 1101 static void setup_segmentation_dequant(VP9_COMMON *const cm) { 1102 // Build y/uv dequant values based on segmentation. 1103 if (cm->seg.enabled) { 1104 int i; 1105 for (i = 0; i < MAX_SEGMENTS; ++i) { 1106 const int qindex = vp9_get_qindex(&cm->seg, i, cm->base_qindex); 1107 cm->y_dequant[i][0] = 1108 vp9_dc_quant(qindex, cm->y_dc_delta_q, cm->bit_depth); 1109 cm->y_dequant[i][1] = vp9_ac_quant(qindex, 0, cm->bit_depth); 1110 cm->uv_dequant[i][0] = 1111 vp9_dc_quant(qindex, cm->uv_dc_delta_q, cm->bit_depth); 1112 cm->uv_dequant[i][1] = 1113 vp9_ac_quant(qindex, cm->uv_ac_delta_q, cm->bit_depth); 1114 } 1115 } else { 1116 const int qindex = cm->base_qindex; 1117 // When segmentation is disabled, only the first value is used. The 1118 // remaining are don't cares. 1119 cm->y_dequant[0][0] = vp9_dc_quant(qindex, cm->y_dc_delta_q, cm->bit_depth); 1120 cm->y_dequant[0][1] = vp9_ac_quant(qindex, 0, cm->bit_depth); 1121 cm->uv_dequant[0][0] = 1122 vp9_dc_quant(qindex, cm->uv_dc_delta_q, cm->bit_depth); 1123 cm->uv_dequant[0][1] = 1124 vp9_ac_quant(qindex, cm->uv_ac_delta_q, cm->bit_depth); 1125 } 1126 } 1127 1128 static INTERP_FILTER read_interp_filter(struct vpx_read_bit_buffer *rb) { 1129 const INTERP_FILTER literal_to_filter[] = { EIGHTTAP_SMOOTH, EIGHTTAP, 1130 EIGHTTAP_SHARP, BILINEAR }; 1131 return vpx_rb_read_bit(rb) ? SWITCHABLE 1132 : literal_to_filter[vpx_rb_read_literal(rb, 2)]; 1133 } 1134 1135 static void setup_render_size(VP9_COMMON *cm, struct vpx_read_bit_buffer *rb) { 1136 cm->render_width = cm->width; 1137 cm->render_height = cm->height; 1138 if (vpx_rb_read_bit(rb)) 1139 vp9_read_frame_size(rb, &cm->render_width, &cm->render_height); 1140 } 1141 1142 static void resize_mv_buffer(VP9_COMMON *cm) { 1143 vpx_free(cm->cur_frame->mvs); 1144 cm->cur_frame->mi_rows = cm->mi_rows; 1145 cm->cur_frame->mi_cols = cm->mi_cols; 1146 CHECK_MEM_ERROR(cm, cm->cur_frame->mvs, 1147 (MV_REF *)vpx_calloc(cm->mi_rows * cm->mi_cols, 1148 sizeof(*cm->cur_frame->mvs))); 1149 } 1150 1151 static void resize_context_buffers(VP9_COMMON *cm, int width, int height) { 1152 #if CONFIG_SIZE_LIMIT 1153 if (width > DECODE_WIDTH_LIMIT || height > DECODE_HEIGHT_LIMIT) 1154 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, 1155 "Dimensions of %dx%d beyond allowed size of %dx%d.", 1156 width, height, DECODE_WIDTH_LIMIT, DECODE_HEIGHT_LIMIT); 1157 #endif 1158 if (cm->width != width || cm->height != height) { 1159 const int new_mi_rows = 1160 ALIGN_POWER_OF_TWO(height, MI_SIZE_LOG2) >> MI_SIZE_LOG2; 1161 const int new_mi_cols = 1162 ALIGN_POWER_OF_TWO(width, MI_SIZE_LOG2) >> MI_SIZE_LOG2; 1163 1164 // Allocations in vp9_alloc_context_buffers() depend on individual 1165 // dimensions as well as the overall size. 1166 if (new_mi_cols > cm->mi_cols || new_mi_rows > cm->mi_rows) { 1167 if (vp9_alloc_context_buffers(cm, width, height)) 1168 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, 1169 "Failed to allocate context buffers"); 1170 } else { 1171 vp9_set_mb_mi(cm, width, height); 1172 } 1173 vp9_init_context_buffers(cm); 1174 cm->width = width; 1175 cm->height = height; 1176 } 1177 if (cm->cur_frame->mvs == NULL || cm->mi_rows > cm->cur_frame->mi_rows || 1178 cm->mi_cols > cm->cur_frame->mi_cols) { 1179 resize_mv_buffer(cm); 1180 } 1181 } 1182 1183 static void setup_frame_size(VP9_COMMON *cm, struct vpx_read_bit_buffer *rb) { 1184 int width, height; 1185 BufferPool *const pool = cm->buffer_pool; 1186 vp9_read_frame_size(rb, &width, &height); 1187 resize_context_buffers(cm, width, height); 1188 setup_render_size(cm, rb); 1189 1190 lock_buffer_pool(pool); 1191 if (vpx_realloc_frame_buffer( 1192 get_frame_new_buffer(cm), cm->width, cm->height, cm->subsampling_x, 1193 cm->subsampling_y, 1194 #if CONFIG_VP9_HIGHBITDEPTH 1195 cm->use_highbitdepth, 1196 #endif 1197 VP9_DEC_BORDER_IN_PIXELS, cm->byte_alignment, 1198 &pool->frame_bufs[cm->new_fb_idx].raw_frame_buffer, pool->get_fb_cb, 1199 pool->cb_priv)) { 1200 unlock_buffer_pool(pool); 1201 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, 1202 "Failed to allocate frame buffer"); 1203 } 1204 unlock_buffer_pool(pool); 1205 1206 pool->frame_bufs[cm->new_fb_idx].buf.subsampling_x = cm->subsampling_x; 1207 pool->frame_bufs[cm->new_fb_idx].buf.subsampling_y = cm->subsampling_y; 1208 pool->frame_bufs[cm->new_fb_idx].buf.bit_depth = (unsigned int)cm->bit_depth; 1209 pool->frame_bufs[cm->new_fb_idx].buf.color_space = cm->color_space; 1210 pool->frame_bufs[cm->new_fb_idx].buf.color_range = cm->color_range; 1211 pool->frame_bufs[cm->new_fb_idx].buf.render_width = cm->render_width; 1212 pool->frame_bufs[cm->new_fb_idx].buf.render_height = cm->render_height; 1213 } 1214 1215 static INLINE int valid_ref_frame_img_fmt(vpx_bit_depth_t ref_bit_depth, 1216 int ref_xss, int ref_yss, 1217 vpx_bit_depth_t this_bit_depth, 1218 int this_xss, int this_yss) { 1219 return ref_bit_depth == this_bit_depth && ref_xss == this_xss && 1220 ref_yss == this_yss; 1221 } 1222 1223 static void setup_frame_size_with_refs(VP9_COMMON *cm, 1224 struct vpx_read_bit_buffer *rb) { 1225 int width, height; 1226 int found = 0, i; 1227 int has_valid_ref_frame = 0; 1228 BufferPool *const pool = cm->buffer_pool; 1229 for (i = 0; i < REFS_PER_FRAME; ++i) { 1230 if (vpx_rb_read_bit(rb)) { 1231 if (cm->frame_refs[i].idx != INVALID_IDX) { 1232 YV12_BUFFER_CONFIG *const buf = cm->frame_refs[i].buf; 1233 width = buf->y_crop_width; 1234 height = buf->y_crop_height; 1235 found = 1; 1236 break; 1237 } else { 1238 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, 1239 "Failed to decode frame size"); 1240 } 1241 } 1242 } 1243 1244 if (!found) vp9_read_frame_size(rb, &width, &height); 1245 1246 if (width <= 0 || height <= 0) 1247 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, 1248 "Invalid frame size"); 1249 1250 // Check to make sure at least one of frames that this frame references 1251 // has valid dimensions. 1252 for (i = 0; i < REFS_PER_FRAME; ++i) { 1253 RefBuffer *const ref_frame = &cm->frame_refs[i]; 1254 has_valid_ref_frame |= 1255 (ref_frame->idx != INVALID_IDX && 1256 valid_ref_frame_size(ref_frame->buf->y_crop_width, 1257 ref_frame->buf->y_crop_height, width, height)); 1258 } 1259 if (!has_valid_ref_frame) 1260 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, 1261 "Referenced frame has invalid size"); 1262 for (i = 0; i < REFS_PER_FRAME; ++i) { 1263 RefBuffer *const ref_frame = &cm->frame_refs[i]; 1264 if (ref_frame->idx == INVALID_IDX || 1265 !valid_ref_frame_img_fmt(ref_frame->buf->bit_depth, 1266 ref_frame->buf->subsampling_x, 1267 ref_frame->buf->subsampling_y, cm->bit_depth, 1268 cm->subsampling_x, cm->subsampling_y)) 1269 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, 1270 "Referenced frame has incompatible color format"); 1271 } 1272 1273 resize_context_buffers(cm, width, height); 1274 setup_render_size(cm, rb); 1275 1276 lock_buffer_pool(pool); 1277 if (vpx_realloc_frame_buffer( 1278 get_frame_new_buffer(cm), cm->width, cm->height, cm->subsampling_x, 1279 cm->subsampling_y, 1280 #if CONFIG_VP9_HIGHBITDEPTH 1281 cm->use_highbitdepth, 1282 #endif 1283 VP9_DEC_BORDER_IN_PIXELS, cm->byte_alignment, 1284 &pool->frame_bufs[cm->new_fb_idx].raw_frame_buffer, pool->get_fb_cb, 1285 pool->cb_priv)) { 1286 unlock_buffer_pool(pool); 1287 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, 1288 "Failed to allocate frame buffer"); 1289 } 1290 unlock_buffer_pool(pool); 1291 1292 pool->frame_bufs[cm->new_fb_idx].buf.subsampling_x = cm->subsampling_x; 1293 pool->frame_bufs[cm->new_fb_idx].buf.subsampling_y = cm->subsampling_y; 1294 pool->frame_bufs[cm->new_fb_idx].buf.bit_depth = (unsigned int)cm->bit_depth; 1295 pool->frame_bufs[cm->new_fb_idx].buf.color_space = cm->color_space; 1296 pool->frame_bufs[cm->new_fb_idx].buf.color_range = cm->color_range; 1297 pool->frame_bufs[cm->new_fb_idx].buf.render_width = cm->render_width; 1298 pool->frame_bufs[cm->new_fb_idx].buf.render_height = cm->render_height; 1299 } 1300 1301 static void setup_tile_info(VP9_COMMON *cm, struct vpx_read_bit_buffer *rb) { 1302 int min_log2_tile_cols, max_log2_tile_cols, max_ones; 1303 vp9_get_tile_n_bits(cm->mi_cols, &min_log2_tile_cols, &max_log2_tile_cols); 1304 1305 // columns 1306 max_ones = max_log2_tile_cols - min_log2_tile_cols; 1307 cm->log2_tile_cols = min_log2_tile_cols; 1308 while (max_ones-- && vpx_rb_read_bit(rb)) cm->log2_tile_cols++; 1309 1310 if (cm->log2_tile_cols > 6) 1311 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, 1312 "Invalid number of tile columns"); 1313 1314 // rows 1315 cm->log2_tile_rows = vpx_rb_read_bit(rb); 1316 if (cm->log2_tile_rows) cm->log2_tile_rows += vpx_rb_read_bit(rb); 1317 } 1318 1319 // Reads the next tile returning its size and adjusting '*data' accordingly 1320 // based on 'is_last'. 1321 static void get_tile_buffer(const uint8_t *const data_end, int is_last, 1322 struct vpx_internal_error_info *error_info, 1323 const uint8_t **data, vpx_decrypt_cb decrypt_cb, 1324 void *decrypt_state, TileBuffer *buf) { 1325 size_t size; 1326 1327 if (!is_last) { 1328 if (!read_is_valid(*data, 4, data_end)) 1329 vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME, 1330 "Truncated packet or corrupt tile length"); 1331 1332 if (decrypt_cb) { 1333 uint8_t be_data[4]; 1334 decrypt_cb(decrypt_state, *data, be_data, 4); 1335 size = mem_get_be32(be_data); 1336 } else { 1337 size = mem_get_be32(*data); 1338 } 1339 *data += 4; 1340 1341 if (size > (size_t)(data_end - *data)) 1342 vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME, 1343 "Truncated packet or corrupt tile size"); 1344 } else { 1345 size = data_end - *data; 1346 } 1347 1348 buf->data = *data; 1349 buf->size = size; 1350 1351 *data += size; 1352 } 1353 1354 static void get_tile_buffers(VP9Decoder *pbi, const uint8_t *data, 1355 const uint8_t *data_end, int tile_cols, 1356 int tile_rows, 1357 TileBuffer (*tile_buffers)[1 << 6]) { 1358 int r, c; 1359 1360 for (r = 0; r < tile_rows; ++r) { 1361 for (c = 0; c < tile_cols; ++c) { 1362 const int is_last = (r == tile_rows - 1) && (c == tile_cols - 1); 1363 TileBuffer *const buf = &tile_buffers[r][c]; 1364 buf->col = c; 1365 get_tile_buffer(data_end, is_last, &pbi->common.error, &data, 1366 pbi->decrypt_cb, pbi->decrypt_state, buf); 1367 } 1368 } 1369 } 1370 1371 static const uint8_t *decode_tiles(VP9Decoder *pbi, const uint8_t *data, 1372 const uint8_t *data_end) { 1373 VP9_COMMON *const cm = &pbi->common; 1374 const VPxWorkerInterface *const winterface = vpx_get_worker_interface(); 1375 const int aligned_cols = mi_cols_aligned_to_sb(cm->mi_cols); 1376 const int tile_cols = 1 << cm->log2_tile_cols; 1377 const int tile_rows = 1 << cm->log2_tile_rows; 1378 TileBuffer tile_buffers[4][1 << 6]; 1379 int tile_row, tile_col; 1380 int mi_row, mi_col; 1381 TileWorkerData *tile_data = NULL; 1382 1383 if (cm->lf.filter_level && !cm->skip_loop_filter && 1384 pbi->lf_worker.data1 == NULL) { 1385 CHECK_MEM_ERROR(cm, pbi->lf_worker.data1, 1386 vpx_memalign(32, sizeof(LFWorkerData))); 1387 pbi->lf_worker.hook = (VPxWorkerHook)vp9_loop_filter_worker; 1388 if (pbi->max_threads > 1 && !winterface->reset(&pbi->lf_worker)) { 1389 vpx_internal_error(&cm->error, VPX_CODEC_ERROR, 1390 "Loop filter thread creation failed"); 1391 } 1392 } 1393 1394 if (cm->lf.filter_level && !cm->skip_loop_filter) { 1395 LFWorkerData *const lf_data = (LFWorkerData *)pbi->lf_worker.data1; 1396 // Be sure to sync as we might be resuming after a failed frame decode. 1397 winterface->sync(&pbi->lf_worker); 1398 vp9_loop_filter_data_reset(lf_data, get_frame_new_buffer(cm), cm, 1399 pbi->mb.plane); 1400 } 1401 1402 assert(tile_rows <= 4); 1403 assert(tile_cols <= (1 << 6)); 1404 1405 // Note: this memset assumes above_context[0], [1] and [2] 1406 // are allocated as part of the same buffer. 1407 memset(cm->above_context, 0, 1408 sizeof(*cm->above_context) * MAX_MB_PLANE * 2 * aligned_cols); 1409 1410 memset(cm->above_seg_context, 0, 1411 sizeof(*cm->above_seg_context) * aligned_cols); 1412 1413 vp9_reset_lfm(cm); 1414 1415 get_tile_buffers(pbi, data, data_end, tile_cols, tile_rows, tile_buffers); 1416 1417 // Load all tile information into tile_data. 1418 for (tile_row = 0; tile_row < tile_rows; ++tile_row) { 1419 for (tile_col = 0; tile_col < tile_cols; ++tile_col) { 1420 const TileBuffer *const buf = &tile_buffers[tile_row][tile_col]; 1421 tile_data = pbi->tile_worker_data + tile_cols * tile_row + tile_col; 1422 tile_data->xd = pbi->mb; 1423 tile_data->xd.corrupted = 0; 1424 tile_data->xd.counts = 1425 cm->frame_parallel_decoding_mode ? NULL : &cm->counts; 1426 vp9_zero(tile_data->dqcoeff); 1427 vp9_tile_init(&tile_data->xd.tile, cm, tile_row, tile_col); 1428 setup_token_decoder(buf->data, data_end, buf->size, &cm->error, 1429 &tile_data->bit_reader, pbi->decrypt_cb, 1430 pbi->decrypt_state); 1431 vp9_init_macroblockd(cm, &tile_data->xd, tile_data->dqcoeff); 1432 } 1433 } 1434 1435 for (tile_row = 0; tile_row < tile_rows; ++tile_row) { 1436 TileInfo tile; 1437 vp9_tile_set_row(&tile, cm, tile_row); 1438 for (mi_row = tile.mi_row_start; mi_row < tile.mi_row_end; 1439 mi_row += MI_BLOCK_SIZE) { 1440 for (tile_col = 0; tile_col < tile_cols; ++tile_col) { 1441 const int col = 1442 pbi->inv_tile_order ? tile_cols - tile_col - 1 : tile_col; 1443 tile_data = pbi->tile_worker_data + tile_cols * tile_row + col; 1444 vp9_tile_set_col(&tile, cm, col); 1445 vp9_zero(tile_data->xd.left_context); 1446 vp9_zero(tile_data->xd.left_seg_context); 1447 for (mi_col = tile.mi_col_start; mi_col < tile.mi_col_end; 1448 mi_col += MI_BLOCK_SIZE) { 1449 decode_partition(tile_data, pbi, mi_row, mi_col, BLOCK_64X64, 4); 1450 } 1451 pbi->mb.corrupted |= tile_data->xd.corrupted; 1452 if (pbi->mb.corrupted) 1453 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, 1454 "Failed to decode tile data"); 1455 } 1456 // Loopfilter one row. 1457 if (cm->lf.filter_level && !cm->skip_loop_filter) { 1458 const int lf_start = mi_row - MI_BLOCK_SIZE; 1459 LFWorkerData *const lf_data = (LFWorkerData *)pbi->lf_worker.data1; 1460 1461 // delay the loopfilter by 1 macroblock row. 1462 if (lf_start < 0) continue; 1463 1464 // decoding has completed: finish up the loop filter in this thread. 1465 if (mi_row + MI_BLOCK_SIZE >= cm->mi_rows) continue; 1466 1467 winterface->sync(&pbi->lf_worker); 1468 lf_data->start = lf_start; 1469 lf_data->stop = mi_row; 1470 if (pbi->max_threads > 1) { 1471 winterface->launch(&pbi->lf_worker); 1472 } else { 1473 winterface->execute(&pbi->lf_worker); 1474 } 1475 } 1476 // After loopfiltering, the last 7 row pixels in each superblock row may 1477 // still be changed by the longest loopfilter of the next superblock 1478 // row. 1479 if (pbi->frame_parallel_decode) 1480 vp9_frameworker_broadcast(pbi->cur_buf, mi_row << MI_BLOCK_SIZE_LOG2); 1481 } 1482 } 1483 1484 // Loopfilter remaining rows in the frame. 1485 if (cm->lf.filter_level && !cm->skip_loop_filter) { 1486 LFWorkerData *const lf_data = (LFWorkerData *)pbi->lf_worker.data1; 1487 winterface->sync(&pbi->lf_worker); 1488 lf_data->start = lf_data->stop; 1489 lf_data->stop = cm->mi_rows; 1490 winterface->execute(&pbi->lf_worker); 1491 } 1492 1493 // Get last tile data. 1494 tile_data = pbi->tile_worker_data + tile_cols * tile_rows - 1; 1495 1496 if (pbi->frame_parallel_decode) 1497 vp9_frameworker_broadcast(pbi->cur_buf, INT_MAX); 1498 return vpx_reader_find_end(&tile_data->bit_reader); 1499 } 1500 1501 // On entry 'tile_data->data_end' points to the end of the input frame, on exit 1502 // it is updated to reflect the bitreader position of the final tile column if 1503 // present in the tile buffer group or NULL otherwise. 1504 static int tile_worker_hook(TileWorkerData *const tile_data, 1505 VP9Decoder *const pbi) { 1506 TileInfo *volatile tile = &tile_data->xd.tile; 1507 const int final_col = (1 << pbi->common.log2_tile_cols) - 1; 1508 const uint8_t *volatile bit_reader_end = NULL; 1509 volatile int n = tile_data->buf_start; 1510 tile_data->error_info.setjmp = 1; 1511 1512 if (setjmp(tile_data->error_info.jmp)) { 1513 tile_data->error_info.setjmp = 0; 1514 tile_data->xd.corrupted = 1; 1515 tile_data->data_end = NULL; 1516 return 0; 1517 } 1518 1519 tile_data->xd.corrupted = 0; 1520 1521 do { 1522 int mi_row, mi_col; 1523 const TileBuffer *const buf = pbi->tile_buffers + n; 1524 vp9_zero(tile_data->dqcoeff); 1525 vp9_tile_init(tile, &pbi->common, 0, buf->col); 1526 setup_token_decoder(buf->data, tile_data->data_end, buf->size, 1527 &tile_data->error_info, &tile_data->bit_reader, 1528 pbi->decrypt_cb, pbi->decrypt_state); 1529 vp9_init_macroblockd(&pbi->common, &tile_data->xd, tile_data->dqcoeff); 1530 // init resets xd.error_info 1531 tile_data->xd.error_info = &tile_data->error_info; 1532 1533 for (mi_row = tile->mi_row_start; mi_row < tile->mi_row_end; 1534 mi_row += MI_BLOCK_SIZE) { 1535 vp9_zero(tile_data->xd.left_context); 1536 vp9_zero(tile_data->xd.left_seg_context); 1537 for (mi_col = tile->mi_col_start; mi_col < tile->mi_col_end; 1538 mi_col += MI_BLOCK_SIZE) { 1539 decode_partition(tile_data, pbi, mi_row, mi_col, BLOCK_64X64, 4); 1540 } 1541 } 1542 1543 if (buf->col == final_col) { 1544 bit_reader_end = vpx_reader_find_end(&tile_data->bit_reader); 1545 } 1546 } while (!tile_data->xd.corrupted && ++n <= tile_data->buf_end); 1547 1548 tile_data->data_end = bit_reader_end; 1549 return !tile_data->xd.corrupted; 1550 } 1551 1552 // sorts in descending order 1553 static int compare_tile_buffers(const void *a, const void *b) { 1554 const TileBuffer *const buf1 = (const TileBuffer *)a; 1555 const TileBuffer *const buf2 = (const TileBuffer *)b; 1556 return (int)(buf2->size - buf1->size); 1557 } 1558 1559 static const uint8_t *decode_tiles_mt(VP9Decoder *pbi, const uint8_t *data, 1560 const uint8_t *data_end) { 1561 VP9_COMMON *const cm = &pbi->common; 1562 const VPxWorkerInterface *const winterface = vpx_get_worker_interface(); 1563 const uint8_t *bit_reader_end = NULL; 1564 const int aligned_mi_cols = mi_cols_aligned_to_sb(cm->mi_cols); 1565 const int tile_cols = 1 << cm->log2_tile_cols; 1566 const int tile_rows = 1 << cm->log2_tile_rows; 1567 const int num_workers = VPXMIN(pbi->max_threads, tile_cols); 1568 int n; 1569 1570 assert(tile_cols <= (1 << 6)); 1571 assert(tile_rows == 1); 1572 (void)tile_rows; 1573 1574 if (pbi->num_tile_workers == 0) { 1575 const int num_threads = pbi->max_threads; 1576 CHECK_MEM_ERROR(cm, pbi->tile_workers, 1577 vpx_malloc(num_threads * sizeof(*pbi->tile_workers))); 1578 for (n = 0; n < num_threads; ++n) { 1579 VPxWorker *const worker = &pbi->tile_workers[n]; 1580 ++pbi->num_tile_workers; 1581 1582 winterface->init(worker); 1583 if (n < num_threads - 1 && !winterface->reset(worker)) { 1584 vpx_internal_error(&cm->error, VPX_CODEC_ERROR, 1585 "Tile decoder thread creation failed"); 1586 } 1587 } 1588 } 1589 1590 // Reset tile decoding hook 1591 for (n = 0; n < num_workers; ++n) { 1592 VPxWorker *const worker = &pbi->tile_workers[n]; 1593 TileWorkerData *const tile_data = 1594 &pbi->tile_worker_data[n + pbi->total_tiles]; 1595 winterface->sync(worker); 1596 tile_data->xd = pbi->mb; 1597 tile_data->xd.counts = 1598 cm->frame_parallel_decoding_mode ? NULL : &tile_data->counts; 1599 worker->hook = (VPxWorkerHook)tile_worker_hook; 1600 worker->data1 = tile_data; 1601 worker->data2 = pbi; 1602 } 1603 1604 // Note: this memset assumes above_context[0], [1] and [2] 1605 // are allocated as part of the same buffer. 1606 memset(cm->above_context, 0, 1607 sizeof(*cm->above_context) * MAX_MB_PLANE * 2 * aligned_mi_cols); 1608 memset(cm->above_seg_context, 0, 1609 sizeof(*cm->above_seg_context) * aligned_mi_cols); 1610 1611 vp9_reset_lfm(cm); 1612 1613 // Load tile data into tile_buffers 1614 get_tile_buffers(pbi, data, data_end, tile_cols, tile_rows, 1615 &pbi->tile_buffers); 1616 1617 // Sort the buffers based on size in descending order. 1618 qsort(pbi->tile_buffers, tile_cols, sizeof(pbi->tile_buffers[0]), 1619 compare_tile_buffers); 1620 1621 if (num_workers == tile_cols) { 1622 // Rearrange the tile buffers such that the largest, and 1623 // presumably the most difficult, tile will be decoded in the main thread. 1624 // This should help minimize the number of instances where the main thread 1625 // is waiting for a worker to complete. 1626 const TileBuffer largest = pbi->tile_buffers[0]; 1627 memmove(pbi->tile_buffers, pbi->tile_buffers + 1, 1628 (tile_cols - 1) * sizeof(pbi->tile_buffers[0])); 1629 pbi->tile_buffers[tile_cols - 1] = largest; 1630 } else { 1631 int start = 0, end = tile_cols - 2; 1632 TileBuffer tmp; 1633 1634 // Interleave the tiles to distribute the load between threads, assuming a 1635 // larger tile implies it is more difficult to decode. 1636 while (start < end) { 1637 tmp = pbi->tile_buffers[start]; 1638 pbi->tile_buffers[start] = pbi->tile_buffers[end]; 1639 pbi->tile_buffers[end] = tmp; 1640 start += 2; 1641 end -= 2; 1642 } 1643 } 1644 1645 // Initialize thread frame counts. 1646 if (!cm->frame_parallel_decoding_mode) { 1647 for (n = 0; n < num_workers; ++n) { 1648 TileWorkerData *const tile_data = 1649 (TileWorkerData *)pbi->tile_workers[n].data1; 1650 vp9_zero(tile_data->counts); 1651 } 1652 } 1653 1654 { 1655 const int base = tile_cols / num_workers; 1656 const int remain = tile_cols % num_workers; 1657 int buf_start = 0; 1658 1659 for (n = 0; n < num_workers; ++n) { 1660 const int count = base + (remain + n) / num_workers; 1661 VPxWorker *const worker = &pbi->tile_workers[n]; 1662 TileWorkerData *const tile_data = (TileWorkerData *)worker->data1; 1663 1664 tile_data->buf_start = buf_start; 1665 tile_data->buf_end = buf_start + count - 1; 1666 tile_data->data_end = data_end; 1667 buf_start += count; 1668 1669 worker->had_error = 0; 1670 if (n == num_workers - 1) { 1671 assert(tile_data->buf_end == tile_cols - 1); 1672 winterface->execute(worker); 1673 } else { 1674 winterface->launch(worker); 1675 } 1676 } 1677 1678 for (; n > 0; --n) { 1679 VPxWorker *const worker = &pbi->tile_workers[n - 1]; 1680 TileWorkerData *const tile_data = (TileWorkerData *)worker->data1; 1681 // TODO(jzern): The tile may have specific error data associated with 1682 // its vpx_internal_error_info which could be propagated to the main info 1683 // in cm. Additionally once the threads have been synced and an error is 1684 // detected, there's no point in continuing to decode tiles. 1685 pbi->mb.corrupted |= !winterface->sync(worker); 1686 if (!bit_reader_end) bit_reader_end = tile_data->data_end; 1687 } 1688 } 1689 1690 // Accumulate thread frame counts. 1691 if (!cm->frame_parallel_decoding_mode) { 1692 for (n = 0; n < num_workers; ++n) { 1693 TileWorkerData *const tile_data = 1694 (TileWorkerData *)pbi->tile_workers[n].data1; 1695 vp9_accumulate_frame_counts(&cm->counts, &tile_data->counts, 1); 1696 } 1697 } 1698 1699 assert(bit_reader_end || pbi->mb.corrupted); 1700 return bit_reader_end; 1701 } 1702 1703 static void error_handler(void *data) { 1704 VP9_COMMON *const cm = (VP9_COMMON *)data; 1705 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, "Truncated packet"); 1706 } 1707 1708 static void read_bitdepth_colorspace_sampling(VP9_COMMON *cm, 1709 struct vpx_read_bit_buffer *rb) { 1710 if (cm->profile >= PROFILE_2) { 1711 cm->bit_depth = vpx_rb_read_bit(rb) ? VPX_BITS_12 : VPX_BITS_10; 1712 #if CONFIG_VP9_HIGHBITDEPTH 1713 cm->use_highbitdepth = 1; 1714 #endif 1715 } else { 1716 cm->bit_depth = VPX_BITS_8; 1717 #if CONFIG_VP9_HIGHBITDEPTH 1718 cm->use_highbitdepth = 0; 1719 #endif 1720 } 1721 cm->color_space = vpx_rb_read_literal(rb, 3); 1722 if (cm->color_space != VPX_CS_SRGB) { 1723 cm->color_range = (vpx_color_range_t)vpx_rb_read_bit(rb); 1724 if (cm->profile == PROFILE_1 || cm->profile == PROFILE_3) { 1725 cm->subsampling_x = vpx_rb_read_bit(rb); 1726 cm->subsampling_y = vpx_rb_read_bit(rb); 1727 if (cm->subsampling_x == 1 && cm->subsampling_y == 1) 1728 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, 1729 "4:2:0 color not supported in profile 1 or 3"); 1730 if (vpx_rb_read_bit(rb)) 1731 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, 1732 "Reserved bit set"); 1733 } else { 1734 cm->subsampling_y = cm->subsampling_x = 1; 1735 } 1736 } else { 1737 cm->color_range = VPX_CR_FULL_RANGE; 1738 if (cm->profile == PROFILE_1 || cm->profile == PROFILE_3) { 1739 // Note if colorspace is SRGB then 4:4:4 chroma sampling is assumed. 1740 // 4:2:2 or 4:4:0 chroma sampling is not allowed. 1741 cm->subsampling_y = cm->subsampling_x = 0; 1742 if (vpx_rb_read_bit(rb)) 1743 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, 1744 "Reserved bit set"); 1745 } else { 1746 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, 1747 "4:4:4 color not supported in profile 0 or 2"); 1748 } 1749 } 1750 } 1751 1752 static size_t read_uncompressed_header(VP9Decoder *pbi, 1753 struct vpx_read_bit_buffer *rb) { 1754 VP9_COMMON *const cm = &pbi->common; 1755 BufferPool *const pool = cm->buffer_pool; 1756 RefCntBuffer *const frame_bufs = pool->frame_bufs; 1757 int i, mask, ref_index = 0; 1758 size_t sz; 1759 1760 cm->last_frame_type = cm->frame_type; 1761 cm->last_intra_only = cm->intra_only; 1762 1763 if (vpx_rb_read_literal(rb, 2) != VP9_FRAME_MARKER) 1764 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, 1765 "Invalid frame marker"); 1766 1767 cm->profile = vp9_read_profile(rb); 1768 #if CONFIG_VP9_HIGHBITDEPTH 1769 if (cm->profile >= MAX_PROFILES) 1770 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, 1771 "Unsupported bitstream profile"); 1772 #else 1773 if (cm->profile >= PROFILE_2) 1774 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, 1775 "Unsupported bitstream profile"); 1776 #endif 1777 1778 cm->show_existing_frame = vpx_rb_read_bit(rb); 1779 if (cm->show_existing_frame) { 1780 // Show an existing frame directly. 1781 const int frame_to_show = cm->ref_frame_map[vpx_rb_read_literal(rb, 3)]; 1782 lock_buffer_pool(pool); 1783 if (frame_to_show < 0 || frame_bufs[frame_to_show].ref_count < 1) { 1784 unlock_buffer_pool(pool); 1785 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, 1786 "Buffer %d does not contain a decoded frame", 1787 frame_to_show); 1788 } 1789 1790 ref_cnt_fb(frame_bufs, &cm->new_fb_idx, frame_to_show); 1791 unlock_buffer_pool(pool); 1792 pbi->refresh_frame_flags = 0; 1793 cm->lf.filter_level = 0; 1794 cm->show_frame = 1; 1795 1796 if (pbi->frame_parallel_decode) { 1797 for (i = 0; i < REF_FRAMES; ++i) 1798 cm->next_ref_frame_map[i] = cm->ref_frame_map[i]; 1799 } 1800 return 0; 1801 } 1802 1803 cm->frame_type = (FRAME_TYPE)vpx_rb_read_bit(rb); 1804 cm->show_frame = vpx_rb_read_bit(rb); 1805 cm->error_resilient_mode = vpx_rb_read_bit(rb); 1806 1807 if (cm->frame_type == KEY_FRAME) { 1808 if (!vp9_read_sync_code(rb)) 1809 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, 1810 "Invalid frame sync code"); 1811 1812 read_bitdepth_colorspace_sampling(cm, rb); 1813 pbi->refresh_frame_flags = (1 << REF_FRAMES) - 1; 1814 1815 for (i = 0; i < REFS_PER_FRAME; ++i) { 1816 cm->frame_refs[i].idx = INVALID_IDX; 1817 cm->frame_refs[i].buf = NULL; 1818 } 1819 1820 setup_frame_size(cm, rb); 1821 if (pbi->need_resync) { 1822 memset(&cm->ref_frame_map, -1, sizeof(cm->ref_frame_map)); 1823 pbi->need_resync = 0; 1824 } 1825 } else { 1826 cm->intra_only = cm->show_frame ? 0 : vpx_rb_read_bit(rb); 1827 1828 cm->reset_frame_context = 1829 cm->error_resilient_mode ? 0 : vpx_rb_read_literal(rb, 2); 1830 1831 if (cm->intra_only) { 1832 if (!vp9_read_sync_code(rb)) 1833 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, 1834 "Invalid frame sync code"); 1835 if (cm->profile > PROFILE_0) { 1836 read_bitdepth_colorspace_sampling(cm, rb); 1837 } else { 1838 // NOTE: The intra-only frame header does not include the specification 1839 // of either the color format or color sub-sampling in profile 0. VP9 1840 // specifies that the default color format should be YUV 4:2:0 in this 1841 // case (normative). 1842 cm->color_space = VPX_CS_BT_601; 1843 cm->color_range = VPX_CR_STUDIO_RANGE; 1844 cm->subsampling_y = cm->subsampling_x = 1; 1845 cm->bit_depth = VPX_BITS_8; 1846 #if CONFIG_VP9_HIGHBITDEPTH 1847 cm->use_highbitdepth = 0; 1848 #endif 1849 } 1850 1851 pbi->refresh_frame_flags = vpx_rb_read_literal(rb, REF_FRAMES); 1852 setup_frame_size(cm, rb); 1853 if (pbi->need_resync) { 1854 memset(&cm->ref_frame_map, -1, sizeof(cm->ref_frame_map)); 1855 pbi->need_resync = 0; 1856 } 1857 } else if (pbi->need_resync != 1) { /* Skip if need resync */ 1858 pbi->refresh_frame_flags = vpx_rb_read_literal(rb, REF_FRAMES); 1859 for (i = 0; i < REFS_PER_FRAME; ++i) { 1860 const int ref = vpx_rb_read_literal(rb, REF_FRAMES_LOG2); 1861 const int idx = cm->ref_frame_map[ref]; 1862 RefBuffer *const ref_frame = &cm->frame_refs[i]; 1863 ref_frame->idx = idx; 1864 ref_frame->buf = &frame_bufs[idx].buf; 1865 cm->ref_frame_sign_bias[LAST_FRAME + i] = vpx_rb_read_bit(rb); 1866 } 1867 1868 setup_frame_size_with_refs(cm, rb); 1869 1870 cm->allow_high_precision_mv = vpx_rb_read_bit(rb); 1871 cm->interp_filter = read_interp_filter(rb); 1872 1873 for (i = 0; i < REFS_PER_FRAME; ++i) { 1874 RefBuffer *const ref_buf = &cm->frame_refs[i]; 1875 #if CONFIG_VP9_HIGHBITDEPTH 1876 vp9_setup_scale_factors_for_frame( 1877 &ref_buf->sf, ref_buf->buf->y_crop_width, 1878 ref_buf->buf->y_crop_height, cm->width, cm->height, 1879 cm->use_highbitdepth); 1880 #else 1881 vp9_setup_scale_factors_for_frame( 1882 &ref_buf->sf, ref_buf->buf->y_crop_width, 1883 ref_buf->buf->y_crop_height, cm->width, cm->height); 1884 #endif 1885 } 1886 } 1887 } 1888 #if CONFIG_VP9_HIGHBITDEPTH 1889 get_frame_new_buffer(cm)->bit_depth = cm->bit_depth; 1890 #endif 1891 get_frame_new_buffer(cm)->color_space = cm->color_space; 1892 get_frame_new_buffer(cm)->color_range = cm->color_range; 1893 get_frame_new_buffer(cm)->render_width = cm->render_width; 1894 get_frame_new_buffer(cm)->render_height = cm->render_height; 1895 1896 if (pbi->need_resync) { 1897 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, 1898 "Keyframe / intra-only frame required to reset decoder" 1899 " state"); 1900 } 1901 1902 if (!cm->error_resilient_mode) { 1903 cm->refresh_frame_context = vpx_rb_read_bit(rb); 1904 cm->frame_parallel_decoding_mode = vpx_rb_read_bit(rb); 1905 if (!cm->frame_parallel_decoding_mode) vp9_zero(cm->counts); 1906 } else { 1907 cm->refresh_frame_context = 0; 1908 cm->frame_parallel_decoding_mode = 1; 1909 } 1910 1911 // This flag will be overridden by the call to vp9_setup_past_independence 1912 // below, forcing the use of context 0 for those frame types. 1913 cm->frame_context_idx = vpx_rb_read_literal(rb, FRAME_CONTEXTS_LOG2); 1914 1915 // Generate next_ref_frame_map. 1916 lock_buffer_pool(pool); 1917 for (mask = pbi->refresh_frame_flags; mask; mask >>= 1) { 1918 if (mask & 1) { 1919 cm->next_ref_frame_map[ref_index] = cm->new_fb_idx; 1920 ++frame_bufs[cm->new_fb_idx].ref_count; 1921 } else { 1922 cm->next_ref_frame_map[ref_index] = cm->ref_frame_map[ref_index]; 1923 } 1924 // Current thread holds the reference frame. 1925 if (cm->ref_frame_map[ref_index] >= 0) 1926 ++frame_bufs[cm->ref_frame_map[ref_index]].ref_count; 1927 ++ref_index; 1928 } 1929 1930 for (; ref_index < REF_FRAMES; ++ref_index) { 1931 cm->next_ref_frame_map[ref_index] = cm->ref_frame_map[ref_index]; 1932 // Current thread holds the reference frame. 1933 if (cm->ref_frame_map[ref_index] >= 0) 1934 ++frame_bufs[cm->ref_frame_map[ref_index]].ref_count; 1935 } 1936 unlock_buffer_pool(pool); 1937 pbi->hold_ref_buf = 1; 1938 1939 if (frame_is_intra_only(cm) || cm->error_resilient_mode) 1940 vp9_setup_past_independence(cm); 1941 1942 setup_loopfilter(&cm->lf, rb); 1943 setup_quantization(cm, &pbi->mb, rb); 1944 setup_segmentation(&cm->seg, rb); 1945 setup_segmentation_dequant(cm); 1946 1947 setup_tile_info(cm, rb); 1948 sz = vpx_rb_read_literal(rb, 16); 1949 1950 if (sz == 0) 1951 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, 1952 "Invalid header size"); 1953 1954 return sz; 1955 } 1956 1957 static int read_compressed_header(VP9Decoder *pbi, const uint8_t *data, 1958 size_t partition_size) { 1959 VP9_COMMON *const cm = &pbi->common; 1960 MACROBLOCKD *const xd = &pbi->mb; 1961 FRAME_CONTEXT *const fc = cm->fc; 1962 vpx_reader r; 1963 int k; 1964 1965 if (vpx_reader_init(&r, data, partition_size, pbi->decrypt_cb, 1966 pbi->decrypt_state)) 1967 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, 1968 "Failed to allocate bool decoder 0"); 1969 1970 cm->tx_mode = xd->lossless ? ONLY_4X4 : read_tx_mode(&r); 1971 if (cm->tx_mode == TX_MODE_SELECT) read_tx_mode_probs(&fc->tx_probs, &r); 1972 read_coef_probs(fc, cm->tx_mode, &r); 1973 1974 for (k = 0; k < SKIP_CONTEXTS; ++k) 1975 vp9_diff_update_prob(&r, &fc->skip_probs[k]); 1976 1977 if (!frame_is_intra_only(cm)) { 1978 nmv_context *const nmvc = &fc->nmvc; 1979 int i, j; 1980 1981 read_inter_mode_probs(fc, &r); 1982 1983 if (cm->interp_filter == SWITCHABLE) read_switchable_interp_probs(fc, &r); 1984 1985 for (i = 0; i < INTRA_INTER_CONTEXTS; i++) 1986 vp9_diff_update_prob(&r, &fc->intra_inter_prob[i]); 1987 1988 cm->reference_mode = read_frame_reference_mode(cm, &r); 1989 if (cm->reference_mode != SINGLE_REFERENCE) 1990 setup_compound_reference_mode(cm); 1991 read_frame_reference_mode_probs(cm, &r); 1992 1993 for (j = 0; j < BLOCK_SIZE_GROUPS; j++) 1994 for (i = 0; i < INTRA_MODES - 1; ++i) 1995 vp9_diff_update_prob(&r, &fc->y_mode_prob[j][i]); 1996 1997 for (j = 0; j < PARTITION_CONTEXTS; ++j) 1998 for (i = 0; i < PARTITION_TYPES - 1; ++i) 1999 vp9_diff_update_prob(&r, &fc->partition_prob[j][i]); 2000 2001 read_mv_probs(nmvc, cm->allow_high_precision_mv, &r); 2002 } 2003 2004 return vpx_reader_has_error(&r); 2005 } 2006 2007 static struct vpx_read_bit_buffer *init_read_bit_buffer( 2008 VP9Decoder *pbi, struct vpx_read_bit_buffer *rb, const uint8_t *data, 2009 const uint8_t *data_end, uint8_t clear_data[MAX_VP9_HEADER_SIZE]) { 2010 rb->bit_offset = 0; 2011 rb->error_handler = error_handler; 2012 rb->error_handler_data = &pbi->common; 2013 if (pbi->decrypt_cb) { 2014 const int n = (int)VPXMIN(MAX_VP9_HEADER_SIZE, data_end - data); 2015 pbi->decrypt_cb(pbi->decrypt_state, data, clear_data, n); 2016 rb->bit_buffer = clear_data; 2017 rb->bit_buffer_end = clear_data + n; 2018 } else { 2019 rb->bit_buffer = data; 2020 rb->bit_buffer_end = data_end; 2021 } 2022 return rb; 2023 } 2024 2025 //------------------------------------------------------------------------------ 2026 2027 int vp9_read_sync_code(struct vpx_read_bit_buffer *const rb) { 2028 return vpx_rb_read_literal(rb, 8) == VP9_SYNC_CODE_0 && 2029 vpx_rb_read_literal(rb, 8) == VP9_SYNC_CODE_1 && 2030 vpx_rb_read_literal(rb, 8) == VP9_SYNC_CODE_2; 2031 } 2032 2033 void vp9_read_frame_size(struct vpx_read_bit_buffer *rb, int *width, 2034 int *height) { 2035 *width = vpx_rb_read_literal(rb, 16) + 1; 2036 *height = vpx_rb_read_literal(rb, 16) + 1; 2037 } 2038 2039 BITSTREAM_PROFILE vp9_read_profile(struct vpx_read_bit_buffer *rb) { 2040 int profile = vpx_rb_read_bit(rb); 2041 profile |= vpx_rb_read_bit(rb) << 1; 2042 if (profile > 2) profile += vpx_rb_read_bit(rb); 2043 return (BITSTREAM_PROFILE)profile; 2044 } 2045 2046 void vp9_decode_frame(VP9Decoder *pbi, const uint8_t *data, 2047 const uint8_t *data_end, const uint8_t **p_data_end) { 2048 VP9_COMMON *const cm = &pbi->common; 2049 MACROBLOCKD *const xd = &pbi->mb; 2050 struct vpx_read_bit_buffer rb; 2051 int context_updated = 0; 2052 uint8_t clear_data[MAX_VP9_HEADER_SIZE]; 2053 const size_t first_partition_size = read_uncompressed_header( 2054 pbi, init_read_bit_buffer(pbi, &rb, data, data_end, clear_data)); 2055 const int tile_rows = 1 << cm->log2_tile_rows; 2056 const int tile_cols = 1 << cm->log2_tile_cols; 2057 YV12_BUFFER_CONFIG *const new_fb = get_frame_new_buffer(cm); 2058 xd->cur_buf = new_fb; 2059 2060 if (!first_partition_size) { 2061 // showing a frame directly 2062 *p_data_end = data + (cm->profile <= PROFILE_2 ? 1 : 2); 2063 return; 2064 } 2065 2066 data += vpx_rb_bytes_read(&rb); 2067 if (!read_is_valid(data, first_partition_size, data_end)) 2068 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, 2069 "Truncated packet or corrupt header length"); 2070 2071 cm->use_prev_frame_mvs = 2072 !cm->error_resilient_mode && cm->width == cm->last_width && 2073 cm->height == cm->last_height && !cm->last_intra_only && 2074 cm->last_show_frame && (cm->last_frame_type != KEY_FRAME); 2075 2076 vp9_setup_block_planes(xd, cm->subsampling_x, cm->subsampling_y); 2077 2078 *cm->fc = cm->frame_contexts[cm->frame_context_idx]; 2079 if (!cm->fc->initialized) 2080 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, 2081 "Uninitialized entropy context."); 2082 2083 xd->corrupted = 0; 2084 new_fb->corrupted = read_compressed_header(pbi, data, first_partition_size); 2085 if (new_fb->corrupted) 2086 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, 2087 "Decode failed. Frame data header is corrupted."); 2088 2089 if (cm->lf.filter_level && !cm->skip_loop_filter) { 2090 vp9_loop_filter_frame_init(cm, cm->lf.filter_level); 2091 } 2092 2093 // If encoded in frame parallel mode, frame context is ready after decoding 2094 // the frame header. 2095 if (pbi->frame_parallel_decode && cm->frame_parallel_decoding_mode) { 2096 VPxWorker *const worker = pbi->frame_worker_owner; 2097 FrameWorkerData *const frame_worker_data = worker->data1; 2098 if (cm->refresh_frame_context) { 2099 context_updated = 1; 2100 cm->frame_contexts[cm->frame_context_idx] = *cm->fc; 2101 } 2102 vp9_frameworker_lock_stats(worker); 2103 pbi->cur_buf->row = -1; 2104 pbi->cur_buf->col = -1; 2105 frame_worker_data->frame_context_ready = 1; 2106 // Signal the main thread that context is ready. 2107 vp9_frameworker_signal_stats(worker); 2108 vp9_frameworker_unlock_stats(worker); 2109 } 2110 2111 if (pbi->tile_worker_data == NULL || 2112 (tile_cols * tile_rows) != pbi->total_tiles) { 2113 const int num_tile_workers = 2114 tile_cols * tile_rows + ((pbi->max_threads > 1) ? pbi->max_threads : 0); 2115 const size_t twd_size = num_tile_workers * sizeof(*pbi->tile_worker_data); 2116 // Ensure tile data offsets will be properly aligned. This may fail on 2117 // platforms without DECLARE_ALIGNED(). 2118 assert((sizeof(*pbi->tile_worker_data) % 16) == 0); 2119 vpx_free(pbi->tile_worker_data); 2120 CHECK_MEM_ERROR(cm, pbi->tile_worker_data, vpx_memalign(32, twd_size)); 2121 pbi->total_tiles = tile_rows * tile_cols; 2122 } 2123 2124 if (pbi->max_threads > 1 && tile_rows == 1 && tile_cols > 1) { 2125 // Multi-threaded tile decoder 2126 *p_data_end = decode_tiles_mt(pbi, data + first_partition_size, data_end); 2127 if (!xd->corrupted) { 2128 if (!cm->skip_loop_filter) { 2129 // If multiple threads are used to decode tiles, then we use those 2130 // threads to do parallel loopfiltering. 2131 vp9_loop_filter_frame_mt(new_fb, cm, pbi->mb.plane, cm->lf.filter_level, 2132 0, 0, pbi->tile_workers, pbi->num_tile_workers, 2133 &pbi->lf_row_sync); 2134 } 2135 } else { 2136 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, 2137 "Decode failed. Frame data is corrupted."); 2138 } 2139 } else { 2140 *p_data_end = decode_tiles(pbi, data + first_partition_size, data_end); 2141 } 2142 2143 if (!xd->corrupted) { 2144 if (!cm->error_resilient_mode && !cm->frame_parallel_decoding_mode) { 2145 vp9_adapt_coef_probs(cm); 2146 2147 if (!frame_is_intra_only(cm)) { 2148 vp9_adapt_mode_probs(cm); 2149 vp9_adapt_mv_probs(cm, cm->allow_high_precision_mv); 2150 } 2151 } 2152 } else { 2153 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, 2154 "Decode failed. Frame data is corrupted."); 2155 } 2156 2157 // Non frame parallel update frame context here. 2158 if (cm->refresh_frame_context && !context_updated) 2159 cm->frame_contexts[cm->frame_context_idx] = *cm->fc; 2160 } 2161
